Apparently, the Tea Parties have a rather limited space in DC they feel safe in:

If you are on the subway stay on the Red line between Union Station and Shady Grove, Maryland. If you are on the Blue or Orange line do not go past Eastern Market (Capitol Hill) toward the Potomac Avenue stop and beyond; stay in NW DC and points in Virginia. Do not use the Green line or the Yellow line. These rules are even more important at night. There is of course nothing wrong with many other areas; but you don't know where you are, so you should not explore them.

Someone recommending the Red line over the Green/Yellow line, eh? Click the link above to see the helpful map and other "tips".