This is just dumb. First, it's a slap in the face of the Chinese and the pride they as a nation are justifiably taking in hosting the games.
Two, as the Times notes:
The Chinese and the International Olympic Committee, including Arne Ljungqvist, chair of the I.O.C. medical commission, have repeatedly said that athletes were not at risk because of the air quality here.
During a previously scheduled news conference Tuesday night, Ljungqvist dismissed the athletesÂ’ actions as unnecessary.
Â“I donÂ’t see the need for it, honestly,Â” Ljungqvist said of the masks, although he noted that some athletes with respiratory conditions may need to wear them.
So, unless all the American cyclists have respiratory conditions then there just isn't any need. Don't American athletes have any sense of political propriety, or rather just good manners?