Aggressive social media posts
Directly calling out your ex on social media—whether it’s through tagging him, or hijacking his Facebook page to rant about him—is middle school behavior that screams “Anger issues!” If you know you’re correct in your feelings about someone, you shouldn’t need the validation of everyone else’s “Likes” and comments.
Seeking to make them jealous
So, within a week of the breakup, you’ve managed to find a new boyfriend, and go on two vacations with him, and document every waking moment of them for Instagram? Something smells of attention-seeking.
Ruining their reputation
Publishing details about how financially irresponsible or unhygienic your ex was doesn’t help you in any way. It just makes you look petty—and nobody trusts what a petty person has to say, anyways.
Asking for gifts back
Hey, you gave those when you were feeling warm and loving towards that person. You don’t have any claim to those anymore. Imagine if people who’ve given you gifts, and who you no longer talk to, started asking for their stuff back? You’d probably have a pretty empty apartment.