Re: Example attacks
Sorry, I didn't get back to your original query, but I have been away.
I can't really add to the previous reply, except to agree that NOScript is a learning curve that you will get the hang of very quickly.
As for known threats to Linux, well perhaps this link to Wikipedia might throw some light on it.
Prior to Noscript I had many issues, with pages taking forever to load and seemingly losing the ability to close some pages without rebooting, life since has been trouble free, but just to stoke the paranoia, that could just mean the intrusions have got more sophisticated.