You can modify your email preferences so that they don’t send anything anymore. That’s what I had to do, I got tired of sometime two or three emails a day. Go into account, select email subscriptions.
I’m not sure you can completely strip yourself off the site, but you can get it down to just your name and your class listing.
“In your classmates.com account click on the help link at the bottom of the page. In the search box type in “delete account”. It will give you a link to delete you account information, which deleted your account. Click on the “remove registration” link and you’re all done.”