I often hesitate to answer questions posted by "anonymous" users (users with no account, or not logged in -- you know the ones, the ones that when you click on their "name" is only gives an IP address), because I think, if they haven't supplied an email address -- and why would they, if they're trying to be "anonymous"? -- then they'll never, ever see any answer.
When not logged in, there is indeed a field to supply an email address. But if I, personally were trying to be anonymous, I wouldn't give anyone my email address -- I don't care how secure they think their site is (the generic "they", not "WikiTree they").
Without a way to be notified, then returning back to this site and finding one's previous question, especially after its scrolled off the front page, is a near impossible task. I can barely do it when I'm logged in, and I'm even provided a tab that shows me the questions and answers I've posted.
The worst part, is when they don't provide enough information in their question, and we need to ask them for more clarification -- it'll likely never happen.
So I usually skip those questions.
Of course, the question -- and answer -- will still be on the forum, and maybe it'll help answer someone else's similar question later on in the future. So it can't hurt to try and give an answer. Who knows, maybe someone is listening after all.