Who said I was a mainstram Republican? I never had any intention nor do I have any intention of voting for Romney or Paul, and last I checked those are the only two "Republicans" standing. As much as I would like to vote for Romney just to cancel say for instance your vote, I won't do it out of principle. Romney is not a good candidate for me or America IMHO, neither is Paul, neither is Obama.
If all candidates got the same number of dollars to spend on campaigning and there were no party indicators after their names on the ballots people like Johnson might not be "fringe" candidates. Unfortunately for us (well maybe not for your political interests) two corporations have complete control over the system used to elect our representatives. One is called the Republican National Committee and the Democratic National Committee, which is why only people got upset at SCOTUS when they agreed that corporations were people... the party's remained SILENT.