That solves the badge gaming problem.
And yes the name is of course tongue-in-cheek.
By moving them, they become less fun. :)
All work and no play makes Jack a dull boy.
Don't take the fun away. Consider also that many of the "Fun" questions are loosely tied to Programming/Technology, so not only does it offer a nice release from all of the so serious events throughout my day, it is still benefiting me in some sense.
Create some fun outlet, see how it works. It may just exceed the expectations.
You can also have a tag there "too-serious".
I think the fun questions are a very important part of SO (and SF and SU).
We have a problem on all three sites with questions being too zealously moderated (closing perfectly legitimate programming questions as not-programming-related because they're don't contain code, etc).
They generally mean well, but end up hurting the community (not to mention the poor souls just trying to get an answer).
The obvious name would be 'stackunderflow'; the implication being that you've run out of things to do, and need to waste time somehow.