Facebook already does ban on a domain basis, but of course that's not a fix at all. These things are "viral" by the nature of the Like button since it posts on the user's wall automatically, so it's very easy for the "spammer" to make a new domain and get going again very quickly.
The easiest fix to the spreading of this issue is FB not broadcasting every single time you like something... but they're not gonna do that, we already know. So, the spam will continue.
The easiest fix to the spreading of this issue is FB not broadcasting every single time you like something... but they're not gonna do that, we already know. So, the spam will continue.