If its Ok to kneel during the National Anthem, I dont see how its improper to wear Stars and Stripes bandanas. Flag fetishists care way too much about this. Legally we can burn and desecrate the flag, certainly then we can wear it. Its no more of a stretch to say its patriotic to wear a flag than it is to say that its respectful to protest during flag ceremonies.
I agree with this to some degree. I don't see anything wrong with wearing something with the flag on it and if you want to kneel, fine, that's your right though I personally am not going to see that.
Something I have noticed however is people, as dead0man said, surrounding them in the flag. It almost seems like there is this feeling that prominently displaying our flag often is a perquisite to being patriotic. In some cases it just looks tacky and frankly, participation in democracy is more important to being a patriot than having a flag.