hmm Jason i dont think their should be a negative option of being helpful.
Often you can take a stap at a problem and know its got like a 0.0000000001% chance of sorting the problem, but it could work, and it may be the only help the user is getting.
We cant exactly answer questions perfectly, But we can as best to our abilitys.
And then say we are helpful in some subjects, but arnt in others but try, then it shouldnt be taked away from us....
just my thought