Herman, while I would NEVER say it was ok to put in a ticket simply to ask a GM a joke, if the GM asks if you have any other questions, I don't see the harm in asking for a joke as long as you don't do it every time.

GM's are human. They are doing a fairly boring job. They answer tickets all day, mostly from irate people who don't know what they are talking about ("What do you mean this thing I'm complaining about has been in the patch notes for 2 months? I don't care! I want it changed!") I don't think it bothers them too much to spice up the ticket if they are in a good mood.

I have seen some GM's actually thank a person after handling their request for spicing up their ticket, admitting it had been a boring day. I have seen some laugh at a player for the player's own joke, or something else funny they said or something they involved in the ticket (something in addition to a LEGITIMATE ticket, not a stupid one, or one for a stupid reason.)

Your reaction might vary, and depending on whether or not the GM feels like giving the joke. But I don't think you should say "Asking a GM for a joke is stupid, never ask them for a joke", I think you should say "Be selective when you ask a GM, and not wasting their time specifically for that."

That, and I have seen some really funny GM jokes.

These in particular come to mind.

http://www.wowbash.com/image-4826.html

http://www.wowbash.com/image-16885.html

This one? Don't do this. Don't ever submit a ticket for absolute nonsense.

However the GM response was awesome.

http://www.wowbash.com/image-8286.html