In the very brief time I've had tamed wolves the howling was already getting really annoying and I purposely placed wolf pens far enough that the sound wouldn't carry to the house.

I think they could be allowed to howl every once in a while since they are wolves and it's not like pet dogs IRL never howl. But I guess with a large pack that would probably end up being just as annoying as constant howling.

In any case, it's definitely much better now than it was before -- and no more threads asking for this exact thing.