If that happened, don't use the site anymore. It's pretty simple. And no, the site itself (eg, let's say twitter) never explained WHY those accounts got compromised...b/c that would lead to more potential breakins.
At&t didn't do that, either. Neither did Facebook. Or myspace.
:) FAR, FAR better to be like our site, and just not have that happen.
Though in 99.9% of cases I've heard about involing what most would call "hacking" it's using a shared computer, or shared password, and either not logging off your account...OR a friend who guesses or hears your password and then proceeds to mess with your other accounts.
Unless you are a hacker yourself, or you could get a friend who knows computers to help get your account back. But other then that no, their is no sites to "walk you through" things like this.
haha not unless they tell you(:
not really no