I don't think it's always intended to be rude or mean, I think sometimes it is a self-protective, evem group- protective, defensive response.
I haven't responded to the OP on this thread, but that's because I didn't hit post. I held back because I knew how it would come across, and yet I'm ambivalent as well about not saying anything. Whatever I have to say will not make a difference with the OP, and while I trust my responses, I'm to the point that if the group doesn't see what I see, how important is it to try to get them to? Had you not actually asked, I wouldn't have said, because the person who feels defensive over subtle aggression is often the one who gets viewed as aggressive. I recognized I was heading down that road, but in responding to you, I'm not.
@Jumper Geo provided links to previous threads. Including this one, the way things are presented feels bad, feels off, and I think two natural responses to that are to suspect and even accuse of lying and attention-seeking; the former takes one's trust and safety, the latter takes their focus and support. I note that the OP gets outpourings if love and support on her threads, but doesn't give reacts -- reciprocal attention, appreciation -- and generally responds to what is of personal interest or is in disagreement. I note how her parents' genuine emotional reactions garner a response of indifference or dismissal, like her father's red-rimmed eyes, or how her parents were easily filled, supposedly helicoptering, and yet not bothering her because she's an adult. It seems like everyone in the stories is to be fooled and laughed at, to make a good story about the OP's superiority. And dropping so much personal information is destabilizing for people who read, especially when the OP already went through a high-adrenaline situation of being reported to the police; in this thread, there was the dropping of the first name of the head of ED. I note that she had been home for a few days and came across like she's been feeling physically great since hours at the methylene blue, but took a few days to update the forum, and didn't make a point to say thank you for all the support in the goodbye thread or acknowledge how people may have felt about her attempt and wondering if it believing she'd died. Attention-seeking fits. So does vampiring.
There are always little inconsistencies that can be responded to when called out, and after the police thread, I read the OP and compared it to the discharge summary, I scrutinized both. It's the way the story is told, with lots of detail but little things that are off, and anything I found in the discharge summary that didn't align, I realized could be explained, and I also realized the way it's told is baiting -- it seems inconsistent, and anyone who takes the bait is going to get shit down, shamed and labeled as retarded, nasty, etc.
The overall impression I get from a history of consistent threads she's generated and the red-flag behaviors is that this is all a game, that she is amused by people's responses to what she goes through, she's amused by the game of being called out, and she's amused by how people keep defending and supporting her. She might not be outright lying, but she doesn't present things in a truthful way, doesn't respond to questioning or doubt in a truthful way but tactically. It all comes across like war games more than a kind of group therapy/support that's common in such threads. It's natural to respond with rudeness or meanness in such an arena, and then come across as the aggressor rather than having been aggressed against. People may pick up aggressive weapons in return, and they come out looking bad, especially if they use weapons similar to those of the OP, or if they just let their provoked emotions show.
That's the way I view it. I doubt I'm a hundred percent accurate, but I'm confident in being able to analyze a bigger picture, and in trusting my responses rather than sweeping them under the rug when a more palatable narrative is presented in return. It takes a lot of self-knowing, self-worth, self-trust in perceptions, strength and courage to speak up, and even more so to not be subsequently cowed down by the person or the crowd, even when one is being shamed for how they responded, which is one heck of a powerful tactical defense! Then one has to not only deal with what's being dealt, but also their own faults, and when feeling disempowered by the truth of their own stuff, they may not have enough power to simultaneously keep up the other fight, too, especially from a position of shame and culpability. It's hard to work on two big things at once, but if one can, they come out even more empowered and better manage the next battles that come up (and they always do in life), rather than giving up on self-defense and defense of the group one is in, and/or giving up on the self.