I have two dogs with docked tails (i didn't dock them myself ofc), I do not agree with ear cropping. But tail docking is considered necessary in some breeds. When a dog has a long slender tail they can often cut or break it on furniture while wagging their tail. I read several articles about this, and I sort of agree with it. If a tail is injured it can lead to infection.. which ends up with the tail being docked anyway. So on some breeds I agree with it. If it isn't breed standard it shouldn't be done.
Tail docking is painless if done when very young 1-3 days old, it is normally done with dental bands (the same kind used with bracers and retainers) The nerves are supposed to be not developed yet in the tail, and it comes off as easily as our umbilical cord. It should be done by a vet, of course. Home docking is just barbaric if you aren't trained for it.
I used to whole heartedly disagree with it, until I read more information on it.
Yes I know I'm weird, I love dogs... and eventually I want to show and breed them

And yes, wow where did this topic come from, rofl... it is wayyy off topic ^_^