The Obama people risk seeming off-puttingly humorless in their responses to them–”sad,” “juvenile,” etc. (Thou shalt not ridicule The One.) And if I were McCain I wouldn’t overdo defending them (e.g. saying how proud he is of them), but just say they are a lot of fun and there should be space in political debate for humorous jabs, lighten up, etc. This line of defense would be entirely in keeping with McCain’s “happy warrior” brand.