Yep, we have plenty of hybrids here. Some are bred legally - in some localities (very few) there is no regulation on breeding them. In others it is okay to own them with a permit, which usually carries very strong rules. Many hybrid breeders try to stay "under the radar" - using their wolfdog's lineage as a selling point to potential owners, but telling vets and officials they own a malamute or husky mix to avoid legal problems. In any case, the enforcement of animal laws in the US is very relaxed compared to the standards I have seen in Europe. So in most cases, breeders who wish to remain under the radar can, and continue their breeding with very little oversight of authorities - and sell to whoever.
CSVs are an anomaly here in the US- legal, but certainly a risk to the CSV's safety if their owner represents them as being a wolfdog or some kind of hybrid, because most of the general public - even officials - has no clue about them because they are so rare...it's very important for owners to know the legal ins and outs of the breed, to closely abide by all laws, keep careful records of their dogs, and act responsibly. With recent wolf blood - even past F5, Tamaskan owners have to think about these same things, maybe more so since no major registry recognizes them, and they have no official papers as proof - which they would not if there were no recent wolf heritage. If they are unaware, and they meet an official who "has heard" about the breed...it could cause real danger for the dog.