Rejecting comments quietly

I like having comments enabled on my blogs, but I am also wary of doing that without moderation. There is too much comment-spam out there. Other times I just don't want to accept certain comments but at the same time I don't necessarily want to say "I'm rejecting your comment." (Who me, passive-aggressive?) My method up to now has been to ignore comments I'm not interested in accepting, but my comment moderation list is getting too long.

So I was curious about what happens when you reject a comment on Blogger. Does the commenter get a note that says they were rejected or does the comment simply not appear?

It's hard to tell because you can't reject your own comments, and if you post a comment anonymously, then they certainly can't send you an email to tell you your comment has been rejected. So, I logged in with a separate Google account, posted a comment, and then logged out, then logged in with the first account again and rejected the comment.

So far, I have not received any email telling me that my comment was rejected. Which is what I expected, but it's nice to have it confirmed.