Never seen even the most special individual attempt to hang it from the handle prior to take off.
About a year ago I did read an ASR referring to the window handle coming unlatched inflight resulting in an EICAS msg, this could be the only way I could think of a warning letter being issued.
Couldn't imagine anyone being dumb enough to write up a colleague for it.
Fleet why didn't you just ask him to take it off .....ah I duno