But keep in mind there are also large groups of people who could organize and use this as a model to promote an agenda that most of us would be horrified by.
In the case of SOPA, I don't expect a huge grass-roots community making any serious headway in favor of the legislation, because most of the people who care about SOPA at all hate it.
But there are large communities who:
1. Believe that vaccines are bad.
2. Believe that the global climate isn't changing, or that it's not caused by us.
3. Believe that abortion should remain legal/be abolished (pick the side you don't like).
...and on and on. Do we really want a group to model how to destroy a politician using data mining and potentially nefarious hacking, when it's an issue that WE support that they're being targeted for?
It seems like a step in the wrong direction -- taken to an extreme, politicians would be forced to never do anything that might offend a large enough group, and frankly sometimes such decisions need to be made. It's a Pandora's box, for sure.
NOTE: Not here to discuss the merits of #1-3 above. They're just for illustration.