When I actually notice newbie threads I take immediate notice to them and say this person has gotten off to a bad start and put them on the bad side of things. I think they are pointless.

At a new job you are working at you move around and get a feel for things and people notice you are new. You don't get on the damn speaker system and yell 'I AM THE FRICKIN' NEW GUY! MY NAME IS FRANKLIN THE RETARD! I AM MAKIN' DA MAD MONEYS!"