The display clause prohibits advertising your party / movement / whatever in the Supreme Court building. It's a specific exemption intended to avoid influencing the impartiality of the group responsible for making determinations about the Constitution, which strikes me as not such a dumb idea.

It is unlawful to parade, stand, or move in processions or assemblages in the Supreme Court Building or grounds, or to display in the Building and grounds a flag, banner, or device designed or adapted to bring into public notice a party, organization, or movement.

There are some genuinely stupid acts of government out there like free speech zones and all the security theatre, or attacking photographers. This is not one of them.

Want something to get mad at the government about today? Congress is currently playing an $85 billion dollar game of chicken.

http://www.cbsnews.com/8301-250_162-57572068/sequester-its-j...