But the purpose of civil disobedence was normally to get put in jail and make a public show. If you don't pay your taxes, typically all that happens is the files some paperwork and garnishes your property or wages. Hardly the same thing.

Further, as noted above, if we accept that civil disobedience justifies a gay rights activist not paying his taxes, we need to be prepared for it to justify some Iowa militiaman or KKK member not paying his.