Plurality

I recently saw this post on a website:

"Only if we cared..."

I am always curious about a person who continously refers to himself/herself in the plural. If I may inquire:

1) How many of you are there?
2) Do each of you have different names and if so, what are they?
3) Do each of you have different tax identification numbers and if so, is one ouf your personalities a non-profit organization?
4) Do your different selves talk to each other?