When does following my ex online become stalking?

From celebrities to exes, we've always obsessed over people that intrigue us. Social media just makes that easier - but there's still a line you can cross

I follow my ex-boyfriend across four different platforms and know the name of his new girlfriend's sister. Is this stalking?

You ask a version of the two primary questions pertaining to behavior online: am I being gross? Or, more commonly, is someone being gross to me? The answer in both cases is usually yes, since the internet, if it has done anything, has liberated our grossest instincts, and I salute your attempt to police yours.