Twitter question, I don't have twitter,

Yes, it does.
The real ones are for người nổi tiếng :) (singers, actors, etc.)
When I say "real ones" I'm talking about that little blue bubble with the white checkmark on it.

Example: This is Jared Leto's twitter. How bạn know is the real Jared Leto? Easy, the verification mark :)

Nope, it doesn't, it happens sometimes on fanpop too.