Stop adding me!

Argh! My brother's friends who he meets on the internet keeps adding me as their friend on Facebook. I mean, hello? Who are you? I don't like to add people who I haven't seen before, exception to a person who I met on Neopets.

Anyway, back to the case, what is the point in adding people as your friend if you don't talk to them? I have about 40 friends but like almost 3/4 of them just add me even though they don't talk to me after adding me on Facebook. What the 'eck is with that? It's because they want to spy on me isn't that right >.>