Against, but I believe that in a free market many business entities would come to be contractually obligated to pay certain fees that would have a similar effect.
Imagine I run a diner, Big AL's Borshch Shack, and I have my super awesome borshch recipe that all my customers love. The local beetroot farmers would probably find themselves selling a substantial fraction of their crop to me, and in order to get me to buy their stuff I may require that they get an Uncle Bill's Intellectual Property Alliance certification, which would create a contractual obligation for them not to sell to companies blacklisted by that authority.
Now imagine Yixil Tesiphon's Borshchorama the next town over figures out my super awesome borshch recipe - oh horror! Well, there's no government to protect my patent rights through violence, but I got all the major local producers of beets certified to respect property rights, so I get Uncle Bill to blacklist Yixil, and suddenly he's in for a world of hurt. He has to import his beets from Ukrainistan, which reduces freshness and adds transportation costs. Furthermore, he has to find a new accountant and trash pickup company for his company, because those found it in their best interest, based on the fact that many of their customers are interested in protecting property rights, to have a similar certification. Etc.
So Yixil may do one of three things in this situation: (1) continue doing business through entities that aren't contractually obligated to boycott him, (2) stop using my borshch recipe and appeal to be taken off the blacklist, or (3) pay me to have Uncle Bill's Intellectual Property Alliance take him off the list.