Don't answer, unless you know something is correct. If you don't know, think of the original poster - (s)he knows even less.

No answer is better than an incorrect answer. Really, it's better to know that ones question hasn't been answered then not knowing whether an answer is actually useful. It also means that other people can spend answering questions instead of correcting incorrect answer.

And don't worry questions will get unanswered. They won't on Perlmonks - after all, most people here don't have the doubts you do - they just answer whether it's drivel or not.