I really don't see why everyone here is jumping on Rex's balls.
It's not his fault that someone asked for his opinion on one of Frank's videos. Was he supposed to refuse? It was a while since I saw that one, but I don't remember him claiming he knew better than LL. I might be mis-remembering, but I thought he had answered a question asked him and I don't remember him being anything but respectful towards Frank. (Again, maybe I need to go back and re-watch it. Maybe I missed something.)
LL is your beef with Rex or are you annoyed someone else thought they had to go get a second opinion on something you posted instead of accepting it as gospel? Is that really Rex's fault? Does it really hurt anything? His video commenting on your video had link to it, he recommended going and viewing it if you hadn't and probably drove lots more traffic to you. I don't see that cross-pollination as anything but a benefit to content providers. How does that make him a dick? (You didn't call him a dick, but many of you minions here seem to be starting up a Fuck Rex bandwagon.)
I'm a newbie and I definitely get the impression sometimes that newbies here aren't supposed to have any opinions of their own, but I found his series of videos very interesting. I accidentally ran across his video series about a year ago purely by chance, but after going through 90+ videos I became fascinated with the idea of long range shooting. It is what convinced me to plop down the cash for my first centerfire rifle (RPR baby! All 6.5 CentiMeters of it!!!)
Actually, you have a $100 of my money in your pocket because his video series encouraged me to seek out more information to expand my knowledge and I eventually found your site and signed up for the online training.
Are his videos perfect? Doubt it. Does he have opinions on products that others don't share? Probably. Opinions are like assholes. Does he know as much as LL? Not likely. Are there any factual errors in any of his videos? Everyone is human. However I get the impression that if he had an error and you brought it to his attention in an adult manner he would probably thank you. He didn't strike me as a guy who has an attitude problem.
If someone is a prick to you, by all means light them up. I think people should treat you with the level courtesy you show them. I think they should be appreciative of the time and effort you have put to package and share your knowledge with others. I think some of the people around here should probably show Rex the same courtesy.
Oh, and yes, there are a lot of stupid people on the Internet. Sorry to be the one to break it to you.