I have never used a forum where I can delete a thread except the ones I moderate !
Isn't this why we have an edit button? I'm the king of typo's. I think I honestly have 3-4 typo's per post, no lie.
And I've posted in the wrong forum before. Just ask it to be moved.... or copy/paste it to the right thread. If a mod catches it they'll delete it... or, you end up with 2 posts and get more answers. Not really a bad thing there.
Don't really see an issue here. If you didn't mean to say it, why'd you say it. Errors can be corrected.