The Freezing Is Code Related. It Has Nothing To Do With Your Official/Unofficial Beta Tester Status. The Freeze Problem Has Been In Discussion In The Official Beta Test Forums Long Before The Unofficial Testers Proxy'd Into The Game.
As For Patches And Account Bans... I Wouldn't Worry About That. The Developers Are Extremely Busy With Getting This Game Up And Going/Passing The Sony QAs/Development Schedules/Production Schedules/Etc. They Do Not Have The Time To Waste On Coding/Setup/Chasing Down Unofficial Testers Unless They Were Doing Something Destructive (Spamming, Network Attacks, Etc) At This Point In Time, Everyone Is Having Fun And Playing The Game... If Anything It's Putting Additional Load On The Servers, Which The Code Needs Anyways.