Spam, of course, is unsolicited e-mail.
Many people hate spam and want to make it illegal.
I don't send it, but I don't necessarily think it should be illegal, either. Yet I do hate the vast preponderance of spam that I receive. It's easy enough to delete it, but it is vastly annoying anyway. The stuff I really hate are all those illegal chain letters, get rich letters, etc., etc. The other spam I really hate are ads for XXX sites.