Your e-mail account is probably viewable to the public. Go to your profile and check around for the private option.
A while back I opened an account and started getting a super spam/death ratio. I disabled my public profile and still received a few spam's a day, but fewer then before. Two weeks ago I was up late with a few in me, I got crazy and started replying to a few spam's with the following message "You need to go to jail u M*." In the last week my spam messages have dropped down to only one.