There do seem to be some rabid dog-haters here. AFAIK in the UK dog-haters are rare. There is a long symbiosis between dog and man (person) and we should ignore the extremists on both sides.

That said, if you are at a dog show and your dog goes for another dog you will normally be thrown out of the show for having an animal not under proper control. I have seen behaviour by both dogs and dog owners at festivals that would not be tolerated at dog shows. At Ely last year there was a young man with a boxer that he let do largely as it wished on a loose lead while he drank (and incidentally it was lager not bitter!) with his knuckle-dragging friends while the dog threatened any other dog anywhere near, and looked pretty iffy with humans too. He should have been made to leave.

Some animals do just fine at some festivals. I'm just back from the Knockholt folk-ale and there were 5 dogs and 2 ferrets there, (only about 30 people) and sheep in the next field: zero problems. But it's an acoustic festival and many dogs, particularly if they are gun-shy plainly suffer in range of amplified kick drum and electric bass so it is probably not a good idea to take most dogs to electric festivals.

I wouldn't take my Benjamin (border-cross) to an electric festival because I know he can be pretty iffy with other dogs, and ambivalent with some people, outside the house - and he will suffer, and therefore be more on edge in crowds and/or near loud amplification.

I can't take him to Knockholt either because of the sheep. It isn't rocket science.

If people applied sense, and those who didn't were speedily ejected, I think the problem would be insignificant.