Exes do it after blocking their ex because they want their friends, family, and potential partners to know how horrible their ex is and to let the family and friends know that their suspicions were right about them all along. Also in hopes that word will get back to the person in question so they'll be contacted for more drama to ensue/ make up to happen

. Lets not forget the single moms who talk every damn day about how much they hate their family for not being there in their time of "need" or how bad a father their baby dad is, even though the signs are obvious. simply put people love drama, i just noticed that its women who do it more on social media than men.