sorry, but synergy is not a password thief. its been out there for quite a while with no reports of anything of the kind.

besides, why would the synergy folks want your game account?

depending on your game, the bandwidth may not be encrypted from your client to the game server. if so, then it is passed in the clear... at which point, anyone on your local segment could be sniffing it.

of course, if you don't live alone, i think i'd check my roommates first