Nah, most of them are liars. There have only ever been a couple cases documented to any extent with legitimate indicators that an authenticated account was "hacked." Most of the time it's people blowing smoke with no evidence.
Authenticators are not and never will be 100% effective, but you know what... neither are condoms. Most rational people don't consider their minute fallibility an excuse not to use one. If they don't, it's usually something else, like laziness (don't have one) or something worse.
---------- Post added 2011-03-07 at 02:15 PM ----------
I do think you've been
watching movies too much, son.
It's "possible" yes. It's also possible that a meteor could wipe us out a month from now and we'd only see it coming long enough to regret our inability to act. Doesn't mean we give up on the security of our daily lives. Do I not lock my door just because I know if a robber really wanted to he could break the window?
You secure yourself with an authenticator, and you make yourself a non-target to the level of attention you describe, because it's much easier to go for multiple soft targets than to focus effort on one person who knows what the hell they're doing.