Used to raid with a guy who had to afk during raids for good long periods of time, usually three or four times a raid, sometimes more. His excuses were always the a long the same theme, "Hang on, gotta talk to the cops." "Cops are here, brb" "Dammit, gunshots, brb" He was a beast of a healer though.
Also, the sad part is, I know he wasn't lying about it. The group we had was made up of all RL friends. He just lived in a bad part of town. :\