The thing about consumer boycotts is that it really should be targeted at those groups that support the legislation in question no? Because the goal is to "put the hurt on them where they will feel it."
This only makes sense...those who are for this type of legislation and backing it with money will pull their support when they see the financial impact.
However, that gets tricky because not everyone is aware of exactly who supports HR 3261. Earlier in this thread, Microsoft operating systems were brought up as an example of overpriced software that ends up being pirated, leading to a cycle of escalating prices. So for certain, software developers especially on the scale of MS should be targets for such boycotts no?
But ironically Microsoft is one of the groups opposing HR 3261...
http://www.opencongress.org/contact_congress_letters/new?bill=112-h3261&position=oppose
(Sorry, I am linking to the default "oppose" page so you could see the groups...it was the form I filled out LOL, but there is a "support" page with the same information to be fair...) :p
What I am getting at is that while "Black March" is a noble cause célèbre, it really should be targeted at those (specific) companies supporting the bill. Maybe look over those specific groups (Disney, Nike, RIAA, Netflix, Visa, Viacom, Adidas, Ford Motor Company, the SAG, etc.) before laying out blanket boycotts.