We used to be able to rate questions, back in the day. It's a little too easy to troll, unfortunately. Questions used to display the number of views, as well. Users would get upset when their questions got a lot of views or votes, but no actual responses. I think it's fine, the way it is now.
No, I don't see what the point of that would be. Some users already troll the up/down vote buttons on opinions, so having that option for questions too would just cause more unnecessary drama. Although, we used to be able to rate questions from 1-5 which wasn't so bad but people used to troll that too and just go down the list giving every question 1 star. I think it's fine the way it is right now.
The old gag used to have star ratings on questions. I miss that :(
Some people on this site are overly sensitive I can only imagine the havoc they'll create over someone down voting their question the bitching is already bad enough when it comes to someone getting their opinions down voted