This is going to sound bad. I'll smoke in my barn, however, they're no smoking signs up and written in the rules. I tell boarders "do as I say and not as I do" when it comes to smoking in the barn. Not that I'm a big smoker (maybe 2 or 3 a day during extra stressful weeks) but I have sooo much blood, sweat and tears invested in my barn that I know I'm not going to burn it down. Other people obviously don't have the attachment I have and are more likely to be careless. In fact, those blood, sweat and tears is what started the smoking. Barn management, building indoor arena, building new house and a 4 y/o son is A LOT of stress and it helps a bit. I think every one of my instructors or trainers smoke whenever and where ever. In fact, it drove me nuts that they rode with a cig hanging out of their mouths!
I definitely would say something to your barn owner though! Again, outsiders most likely don't care enough. I would never ever dream of smoking at another barn either.
~ Starline Stables ~