Agreed, it was a small turnout compared to the voting populations.
Still, I see nothing wrong with a peaceful protest urging the gov to stop its big spending ways. To me, this is not a repub vs dem issue. It is a big-gov vs limited gov issue. You'll have idiots in any protest, activists, fringe people but if the protests rallied around opposing big gov, spending practices in the last several yrs and new taxation that we are just starting to see (what may be the tip of the iceberg to come in the next 2-4 yrs), I think that is a just cause.
As the gov continues to spend and taxes continue to rise (taxes other than federal income tax which has not risen and hopefully doesn't), we will see more people join groups like this and it is healthy feedback for the gov.