Yeah, I mean they're just like everyone else, they just have an extraordinary job. And unlike us, they are monitored constantly. X bought a sub at Y sub shop today wearing brand Z shoes and with an unknown person! Yeah, try to kill yourself with non-stop prying eyes, possibly cameras pointed into your house. They see you buying drugs of any type, or suspect someone bringing them to you--instant scandal.
The simple hanging is probably the quickest, easiest to do that no one questions anything if you bought something, and you already have the stuff at home anyway--and you'd already have a door/something in your house that's not visible from a window.