Yes i know you can't link a address to a person, but how do site's like blockchain.info know that they belong to exchanges or Satoshidice or whatever?
Is this just public information that they gathered?
Most of the time the only information that can be attached to an address is public information, so there's a high chance that any time you see any sort of pairing between an address and some sort of website it is public information next to 100% of the time, unless someone else willfully makes the connection.
It's likely never going to be paired to you.