You're a different person online compared to your real life. It's OK. You don't have to irrationally like cats just because you're obsessed with cat videos. You don't have to literally poke the people you poked on Facebook. You don't have to like or follow or tag or comment or stalk celebrities like you do on the Internet.
Because if you did that in real life, you'd be a total creep. BuzzFeed Video imagined seven things that'd be super creepy to do in real life, even though you do them on the Internet. [BuzzFeed Video]