I have about 12 total messages in my GMail inbox: I haven’t used it very much at all. It’s fine, but I haven’t yet worked it into my dysfunctional work style.
Judge of my surprise and amazement when I found 81 spam messages in there today: since all the email I have sent and received was to trusted individuals, I have to assume the spammers are just taking usernames they find in the wild and just appending domains at random. They assume everyone has a GMail account, so just spam everyone@gmail.com.
This revelation (perhaps obvious to everyone else) suggests spammers, like the poor, will always be with us.