I don't have an answer for your question, sorry. Some hunters are just against certain things. For instance, some bow hunters don't like rifle hunters. How i feel is that if it is legal, go for it and enjoy it! In the states where it is legal, I'd be all for trying it out. It'd be something different and interesting. Around my area, we have a lot of stray dogs, and they kill alot of game. If I knew dogs were killing or chasing game in the area, I would do something about it. But, that is totally different than shooting someones dog. If I had a problem with someones pet, I'd go to them about it.
All that being said, I'd consider not letting your dog run deer anymore. If someone in the area has warned you, well you've been warned then. For your dogs sake, break that habbit.
-Jake