I think they seem creepy from a European perspective, where their history is marked with things like this having led to excess. I'm not saying we haven't had problems with too much patriotism, but the worst I can think of is the Red Scare and that eventually fizzled out. So I generally think our normal patriotic displays (flying a flag, saying the pledge, celebrating the fourth) are generally harmless, especially the pledge, which I recited by rote so often when I was a kid I'm surprised I can still recognize individual words (and to the republic for whichistan, one nation undagod, indivisible with libertian justice for all).