At the beginning, there’s nothing wrong with checking up on a guy, especially before a blind date, to make sure that the person you’re going to be with isn’t crazy or married. However, once you’ve looked into who he is and what he’s about, there’s no reason to continue tracking his life online. You don’t need to stalk his Facebook wall and you don’t need to look at every single picture he has on Instagram. Online you may come across something you don’t like, but it may be a misunderstanding on your end. The key here is to e-stalk once, and no more.