I wanted to ask this as I was watching the github hack news with some people coming out impressed with them and their response[2] and others not so much [3]. For me it was easy to not use PoF or Gawker or even Sony products after their series of password hacks as I didn't use them in the first place, but I love github. I would think, though, that those who make these mistakes would be more able to prevent it from happening again in the future than a company who didn't. Not only would they learn from the mistake, but there is monetary motive to do everything to prevent something similar from happening as patio11 pointed out [4].
[1] http://grumomedia.com/why-plenty-of-fish-stores-passwords-in...
[2] http://jtimberman.housepub.org/blog/2012/03/04/github-is-cla...
[3] http://chrisacky.posterous.com/github-you-have-let-us-all-do...
Would you bank with a company that didn't lock their doors at night and had no security guards? Probably not. But somehow, for most people, this doesn't seem analogous.
If it happened, I'd let you know what I did. I'd rather overreact than under-react. We have a really mean looking dog too.
But then, if it's a company whose services I use frequently, I don't know. I have credit card information attached to my Playstation Network account for convenience despite last year's incident. I wasn't a customer of theirs at the time of the hack, so maybe that matters. Perhaps I assume that a high profile company like Sony would make it an extremely high priority to fix the issue since they could not afford to have this happen to then twice, but perhaps that is a foolish position to take.