We're talking about websites blacking out their own pages, or advocating that their customers call up their representatives.

Are you meaning to endorse congress restricting or regulating such influence?

I'd see that as a far worse threat than SOPA. (Maybe you don't disagree.)

Yes, it's acceptable because entrenched conservative interests are against fresh young interests + people with a lot to lose.

If such conservative influence against congress was regulated, then the reputation cost of such blackouts would rise a lot due to the perception that such interests are trying to influence congress. ergo, uneconomical to blackout.

How is it different from Walmart opening a store in a small town, putting local shops out of business by undercutting them, then deciding they don't make enough money and closing?.