Of course the title of this question is intended as an example of the problem I am trying to raise.
I just answered a question (I should not have) that has the title: Every infinite recursive language contains an infinite regular subset
Of course, this statement is wrong. But the site is read by a lot of student who may see this title and remember it without further investigation ... until they use it in a proof with the consequences one might expect (hoping it is not in a job interview).
So I think we should systematically modify titles that seem to be asserting something that is wrong. ... mine excepted, of course. And possibly warn users against doing that (though no one would remember such a rule).