Leaving the Federal ballot blank doesn't get the point across. If you want to demonstrate to the establishment politicians that you aren't going to vote for them anymore, then you've got to vote for a conservative third party. When the politicians see all those votes they didn't get, they'll be falling all over themselves to prove they're conservative enough (assuming enough people vote this way).
There is no point that can be made. The dem and pub sheep are willing lemmings.