I still have hopes like I mentioned that they will actually get one right.
It can be done. Like people mentioned (myself included) Spaceballs and others worked out great. One the ones in the last 10 years I liked was Shriek If You Know What I Did Last Friday the Thirteenth. Sure it wasn't the best comedy ever (I'll never claim it was) but It was what scary movie 1-4 should of been.
It was funny , It parodied the films it was meant to well and added some original twists. One scene I like is when when the killer is wearing a Jason hocky mask ,at the start , His face catches on fire and he dunks it it water. When it comes up it's melted in to the scream mask.
heres the clip -
http://youtube.com/watch?v=48yderT7XE4
I believe the style can work. Look at superhero movies. After batman and robin i'm sure a lot of people thought that hero films could no longer worker. Since then we've had Spider-man , batman begins , x-men and more that prove it can.
Now I agree that all the scary movies , date movie and epic movie suck. I almost felt dumber for even watching them. I'll also say the first scary movie was almost watch-able and had a few funny scenes but over all it still sucked.
All I'm saying is eventually a film like them will come out that works. I can almost guarantee. I'm hoping it's superhero movie . With all the criticisms that epic movie , scary movie 4 and date movie got they HAVE to realise "wait we need to improve these and fast"