Honestly, the time to think about this is BEFORE hitting "Post" to put your data out there for the world to have a look at. Is your e-mail address in the text area or is it in the box that said "Your Email (optional)"? If it is the second one, you won't have to worry about SPAM as it's encrypted there. If you typed it into the text area, get ready. You'll be busy deleting SPAM.