From what I've heard their targets (assuming it is just one group, which I personally doubt) tend to be political, big commercial organisations (I'm not sure as this counts, they are not a high profile group even if they are or an interesting size), or those that take a specific stance "Anon" don't like (such as trying to arrest/charge/out/what-ever one of their number). This just doesn't feel like the sort of thing that would get them motivated to bother.

What is it that you think Anon might be able to do here? Even if they one of the scammers for a short time there are many more that will still be operating. The scammers are not a single large target like, for instance, Sony.