The Poke comeback is real, and you need to believe it.
The Flirt Poke
Who to do it to: Someone you want to poke IRL. Play it off like, "ha ha, isn't this so retro, we're so funny."
The SURPRISE! I'M A CREEP! Poke
When to do it: Just when your friends think you're normal. Everyone is creepy on the internet; you need to get there before them.
The intentional creep poke
When to use it: Trying to freak out your friends.
The Ironic Poke
When to do it: Anytime after the year 2010.