It's nice feature and all data are from public sources. Why people creep out when someone connects 2 pieces together?
Should be optional
It is optional, once you opted to publicly link the address to your bitcointalk screen name they are linked permanently. You made the choice, if you don't want to link them - don't post them together.
Same goes with facebook, twitter, etc. - if you don't want something going public, don't post it publicly.
So if I put someone else's address somewhere on my profile, my username will be in the blockchain for their address? How long has it worked like this? I'm going to put my name all over the blockchain!
EDIT: Misunderstood. I was thinking you were talking about THE blockchain, not blockchain.info. I thought that sounded kind of weird.