How do you reject people in the game?

[M.Skirt]

I haven't really been online for a while but I just wanted to add: You don't have to answer every message sent your way, especially if you're in a few conversations already.
You're not a bitch for not answering, regardless of what they say.
But then sure you get the "funny" ones that spam you and demand an answer from you, and block works there.