Almost every site with any reference to the BC is tagged. I’ve never had any issues.
Not saying that some haven’t been hacked, but I think it’s more of an attempt at shutting them down, I.E. censorship.
I suspect you are right. Conservative sites may occasionally be hacked with malware, but they are also listed as "dangerous" sites.
That was the case with Orly Taitz's site, where many Freepers complained of a notice by Google that it was a dangerous site. But google seems to work hand in glove with Obama, so it's not unlikely that they did that for political reasons. I didn't see the warning, possibly because I use google search as my default but do not use google toolbar to search with.
I think Obama has put out a lot of orders for his flunkies to do anything they can to sink the "birther" issue, and that includes blacklisting these sites with danger warnings.