I've just been to look at my favourite mail order meat emporium and found that it has been blocked by my ISP's porn filter. I am reasonably certain that there is no good cause, but clearly this presents the possibility that the chap is losing business.
I have contacted the ISP, but their answer is just to turn off the porn filter. Clearly that is an unsatisfactory answer since anyone else with porn filters who tries to visit the site will be blocked.
It seems to me that it could be defamation. I don't know how these things work, but I guess that the system basically has a flag that says "this site is porn".
Is there a better angle to take?