They are not called spam messages, they are called PERSONAL messages. They are PERSONAL.
Repeatedly sending stupid or completely irrelevant messages is called spam. Doesn't matter if you sent it by PM, or if you got a pigeon to deliver it, its still spam either way.
Oh, and you hardly have any room to call us 10 year olds. You are the one that thinks calling someone fat or **** is funny and insulting.