I get this question a LOT. I take for granted my own paranoia when it comes to anything related to my email address. And let me assure you, I have fallen victim to this myself in the past and I guarantee I will forget again in the future.
Never put your email address in a craigslist ad description!
This is a little clip from one of my favorite movies, UHF (Weird Al Yankovich). I believe the main character, Kuni, best describes what happens when you put your email address in a craigslist ad.
Always choose the default option, which is to anonymize your email address. If you put your email address in the listing details, you WILL get spammed into pulp. Just to reiterate, if you TYPE ANYONE’s email address into a craigslist ad they will get spammed. Always allow the ad to anonymize your email address.