Are lawsuits the best way to deal with disinformation?

I spotted this poll at Kos, which addresses the libel actions BBV is taking against Diebold and Diebold employee Rob Pelletier.

Gotta admit I’m surprised to see such strong support for lawsuits–I agree they’re justified (that is, there’s no question that BBV has been libeled, and the links to Diebold are clear), but is it the best way for an organization to spend their energy?

OTOH it is also probably a bad idea to do nothing and hope the libelers will disappear, especially if it’s part of a disinformation campaign. . .

Where should one draw the line, or does it depend on whether one has the money to sue in the first place?  Or on how much money the libeler has?  What if someone’s libel is causing huge distraction, but the person has no assets?  You could spend a lot to sue them, but get nothing for your trouble except for defending your own good name.  What do you think?