That is why I create lots of lots of bitcoin address, one for real life, one for bitcoin forum and etc. This way I can reduce the expose 
This is one of the reasons why I use a new address for EVERY TRANSACTION I receive and I NEVER RE-USE an address I've used in the past.I've been using bitcoin for approximtely a year.
Is there a reason that you think I engage in more than 300 transactions per day?
Also, since I never re-use addresses, many of my addresses and private keys can be deleted once I'm done with them. At the moment, my Bitcoin-Qt wallet has exactly 22 addresses listed in the "Receive" section.