I'm inclined to agree with you, skippydiesel. I haven't voted for a major party for well over 15 years. Indeed, with our preferential voting system, I intentionally put major parties last on my ballot, to be strategic in preventing my preferences being distributed in any other way than the one I choose. I'm one of the few that regularly numbers all 80++ boxes below the line, on the senate ballot slip. Yes, I know.... I'm obsessive. I actually research candidates prior to casting my ballot.
Two-party democracy as it is now practiced in the western world is, in my opinion, a broken distortion of its former self - damaged by powerful & wealthy vested interests pulling strings behind the scenes. Political parties of all persuasions are overly focused on polls, spin, and "wedging" the other party. Only voters can change this.
Some independents are "just plain loopy", but quality independents tend to be more focused on policy that is in the best interests of their electorate - the core business of Parliament. Generally, the more that the big parties have to deal with quality independents, the better the legislation that eventually passes the senate.
As for protest marches and waving placards (yes, I've done this in my time too) I'm inclined to feel it is rather pointless and wasteful of human energy that could be better deployed elsewhere in a campaign. Perhaps it is only useful at kicking-off an effective media campaign. These days, newspapers and broadcast television/radio don't have the huge impact they once did. Social media must also be included, particularly for the younger generation.
Lastly, lets not forget going directly to the source. Perhaps I waste my energy, but I do send letters & e-mail to bureaucrats & parliamentarians at all three levels of government we have (yes, 3 is too many). Sometimes I get a form-letter response... sometimes better. Independents are always more responsive - and they give me the impression they've actually read my correspondence, even if they don't agree - fair enough IMHO. I certainly wrote to many officials regarding implementing all the Forsyth recommendations (incl. ASIC).
OK, that's my rant... sorry for bending your ears