AIM screen names in their profile. That doesn't stop clever folks from sneaking in the occasional hint, most notably (and obviously) in their chosen member handles. It took me a while to figure out that girls who went by names like "IMjenn613" were not actually announcing "I am Jenn", but rather were implying "Instant Message me at jenn613". JDate will take your profile down if they find out. Thought JDate shouldn't really be concerned, these girls never reply on IM either.