In the end it's definitely just one's personal opinion. I don't think it's wrong or right if a Canadian or American wants to wear a kilt in Scotland. I personally probably will not bring my kilt, but I see nothing wrong if someone else does and I wouldn't expect a negative reaction to wearing it. It is true, no matter where you are tourists stick out like a sore thumb. When I was in Ireland they could see us coming a mile away, so believe me I have no false pretenses about fitting in and not being thoroughly touristy. We'll be going to Lock Ness, can you beat that? :-) And here in Florida, we can spot the Europeans, Canadians and Yankees a mile off so I expect no less in return. :-P