I know I am a week late on responding to this, but I just had to put in my $0.01.

I think just about every argument opposing this is weak. All quality software does data validation in order to increase the quality of the product for all it's users (of course there are other reasons, but I don't feel like listing them). Most users are familiar with data validation and I doubt that it makes them feel the site distrusts them.

About not dummying it down. We have several levels of visitors here, but I will break it down into two classes. Those who are programmers and those who are programming or trying to. The programmers are not posting one word titles on SOPW. Those who are not programmers but are trying to "write a script" are the most frequent transgressors. So I say....dummy it down and make it the limit 3 meaningful words. Yep, 3 words. What good question can you ask in less than 3 words? Very, very few. If you do in fact have a good question that you can ask in less than 3 words then you can surely ask it with more words.

I say DO IT!

Update: Other solutions may work too. I am only responding to the solution posted by VSarkiss.

Update: I didn't address one point. Adding warnings and hints is not going to work. The people posting bad titles are not likely to read the warnings or hints and they probably won't care.