If I may be so bold. Your perspective is skewed. The pledge is not about the government. Nowhere in the pledge does it say: "and I support the machine which makes the nation lumber on."
Take in the actual words. The Pledge of Allegiance is about supporting your country. It is about being a patriot.
"I pledge allegiance to the flag of the USA"
Translation = I am an American
"And to the republic for which it stands"
Translation = I believe in the society we live in
(Note: "Republic" does not mean Republican)
Left in for the posterity of the founding father's intents. Take it or leave it as your beliefs in a higher power are your own
Translation = Unified as Americans, regardless of political affiliation
"With liberty and justice for all"
Or so the forefathers had hoped. Obviously not absolute but a heck of a lot better than most countries out there.
So, a person who called themselves a patriot and actually meant it should have no problem saying the pledge because it is about supporting your country (which is what patriotism is) and not about supporting the monkey in a suit who "runs" the country.
It sounds to me that in reality it is less about "being a patriot" and more about "being a non-conformist".
If that is the case that is fine indeed, free country and all that. But, consider that when you refuse to conform you then make yourself obvious (which is the point I know.) And when you are looking for attention sometimes the attention you get is not always positive. When that happens you have to live with the situation you have created.
There are fights that are worth fighting and there are fights that are not. You have to figure out for yourself which they are. And if you fight and lose, then you have to live with the repercussions. That is just part of life.
Personally, I think there are probably bigger battles out there to fight. But that is just me. Rather than get myself shot down over something so trite I would say just stand up for the Pledge. Stand up but stay silent (after all, no one said anything about saying the Pledge...) If, for some asinine reason they come after you for not actually saying the Pledge then tell them okay and just mouth the words along. Not like they will know the difference unless they are standing right there next to you. BUt that is all just my 2 cents and you can take it or leave it. Make no difference to me.
In the meantime, if I may, I recommend you go out and watch the movie 'SLC Punk'. I think you'll like it.