Interestingly enough, Twitter is excellent at that. Maybe they even jump the gun.
Ever since I noticed that when you register a decent domain, someone will instantly register a Twitter account with that name, I have started trying to preempt that.
I accidentally clicked a Twitter link the other day, while apparently still logged in to an account. I was on a VPN at that moment. Instant suspension within 15 seconds. It was astonishing.
