I've noticed is that they only start a profile to comment on something that they know damn well they shouldn't. Those usually have the same date joined and same date "last seen" basically what it comes down to, is don't get caught up with the fantasy. I have other things that I've noticed about it, but it's too truthful and it hits too close to home for many on here, LOL
... discretion is one thing, deceitful is another.