Flash cookies and AJAX requests are a sort of cunning trick for unexperienced Internet users..
I also prefer, like MilesAhead
, a NoScript, it's both very light and it helps me in 99.9% cases.(probably i only think so
Whitelisting will be helpful for trusted and popular sites like Google, Twitter, Facebook...etc
I also tried this panic site
I have got 2 links!This is a huge number, isn't it?)
I am a webmaster and I visit http://www.bookwormlab.com/
about 50 times a day(or even oftener) and it wasn't in that list.
The funniest thing is that one of those 2 sites was their own.
So as a spyware this is not dangerous.