I agree those kinds of actions should be a wakeup call never to donate to the NRSC. It's fine to send money to Senate candidates, but I think it should always been sent to individual candidates, not to PACs. Even Palin and DeMint's PAC is probably funding one or two candidates that most freepers wouldn't like.
Although I have to say the freepers who sent checks to Joe LIEberman showed as bad judgment as the NRSC did for backing Arlen Specter in 2004.
I’m not sure about your last assessment, but I do agree sending money directly to their campaign is better. I’m not convinced their PACs give money to people we don’t like, but I’m certainly not going to say it’s definitive that they don’t.