If you really want to hurt Fox, why not join forces with the many other anti-Fox groups out there (and trust me, there are PLENTY). However, you might just possibly want to know that since Fox is often viewed as a Republican TV station (yeah, I know they only serve themselves and not any one else) you might end up alienating some Republicans with this. But, if you want to go through with it, I'd suggest working with the other anti-Fox groups who may or may not agree with Dr. Paul's views -- strength in numbers.
Anybody who takes Fox seriously will not vote for RP. If these anti-Fox groups had any sense they would be all over the Yahoo finance message board. Embarassing them in front of the invesment community hits home harder than anything else.
Other things can also be done, but this just takes a few minutes and if enough people do it it will have impact.