Gersen: Just by curiosity, is is possible to completely disable all this (IMHO) stupid trophy synchronization part ?
Not explicitly for trophies, but you could simply
not enable automatic login to PSN (you cant do that accidently as it requires password)
Gersen: Personally I don't give a damn about trophies and all those "community stuff" and appart from downloading a patch from time to time I have absolutely no intention to let my PS3 plugged to the Internet.
Unless you want to play online (and therefore need games patched up to the latest version) you dont have to ever connect the PS3 to the net. Required Firmware updates for games come included on Blu-Ray.
Anyway, whats the damgae-report on affected systems? as far as I understood the only problem would be loss of trophies that were obtained in the last 1-2 days.