I think, in most instances anyhow, the if thing are conducted in a respectful and dignified manner few if any will say boo about it. Many may actually appreciate someone tying their own heritage to it, such as a piper in blues and kilt. It's an honor that in a case like that goes both ways, just as it should! There probably isn't a country that isn't represented by someone in the US, which is just another amazing and unique part of our heritage. That's one of my avorite things about being American...we incorporate everyone and honor them all in our unique way, some as Americans and others as immigrants who honor the others in their traditional ways. The "melting pot" is awesome!