Yes. Or rather, I did. I used to change my party affiliation based on which side's primaries I thought were more important. Now that those are ALSO being filled with screened contestants (even to a local level), and the results are being ignored when they don't fit the plan, I've registered Libertarian and probably won't vote in any further primaries. I spend most of my election energy these days trying to get people to show up for their local elections.