I didn't really get anyof them.
Is it  suppose to be inside jokes? Thats the way it seems.
I can appreciate random stupidity (i live on it actually)
As for the intentionally bad art. Like Den said you need to make it more interesting to look at.
Toss in a poor background. And don't force a limit to 4 frames. If you can do a 2 frame comic (duck hit me becase i didn't duck) do it. 
The only inside joke was #1, which everyone seems to like.  I thought #2 was the best.
Good point about the 4 frames though.  I suppose there's nothing wrong with doing 1, 2 or 3 frames.  Just never thought about it.
That's about the limit of my artistic skills, so I don't think we'll be seeing anything more interesting to look at, even if I wanted to.
And these were intended kind of as "Screeners".  They don't really jive with anything in a series, so they may not all make sense.  But I think it's enough to get an idea of the type of humour being used.
Please keep the critiques coming.  The only way I know what to change/improve.
OD