Why so rude?

Curious if it's just me, or do others find it rude when you start a new game with a new player, and send them a "hello" message, and you never hear a word back?

Even if I don't feel like chatting, it's common courtesy to say hello back isn't it?

Not a huge deal, but since I've been entering a lot of tournaments, I've seen a lot more of this than before.