If the person you are writing about is following you, then they will see what you write on their timeline.
If you use their name, ie @usernamehere, then what you write will appear in their @replies.
Also remember that even if they aren't following you and your profile isn't private then they can easily click on your profile and see your tweets.
You are now receiving updates to the account of the person you're "following" through your own twitter feed. You can read messages that person sends out to the Twitter world on your own page rather than having to go to theirs.
You can normally tell by the number of followers that they have. A lot of celebrities are starting to have "verified" accounts too which means Twitter have verified that they are the real person.
Users that don't write in theirs.
Because, it is only another way for people have lives that arent actually theirs.
theirs, there's
There is no way to tell who has looked at your profile. If you see someone posting about how they can see who viewed theirs, it is fake.
Both "they" and "theirs" are third person plural. The pronoun "they" is a personal pronoun, which functions as the subject of a sentence or a clause. The corresponding third person, objective form is "them". The pronoun "theirs" is a possessive pronoun, which takes the place of a noun belonging to two or more people or things.
It depends on what the comment is. If you are commenting on something that they said then you comment on theirs. if you comment on your own page they might not see it.
Script form writing is used when someone is writing a play, movie, or radio show. It uses the names of the people to specify which line is theirs to speak.
You can negotiate with them, however the decision is theirs and you should get it in writing if they agree to drop it. Do not pay anything, until getting proof in writing.
Their is already plural, the possessive form of the third person plural (they, them). The word "theirs" is a predicate adjective form (such as mine, ours, yours, and hers).
Theirs