They may have quit the site themselves. They may have been banned. They may have CTB and either disabled their account before leaving or asked mods to do it after a time period. You could search their last messages for a goodbye thread if you are concerned they CTB- although- not everyone chooses to do one.
Plus- you can ask about the member on this thread- sometimes someone else will know. Although they likely won't go into details if they were banned...
Please post all speculative and memorable posts about users here (e.g., where is X, has anyone heard of Y, etc.) This thread is not for discussing why was X banned from this forum. Please do not use this thread for that. Thanks for your understanding. SS Team.
sanctioned-suicide.net