A reader just sent this in, it's a new sign in the Columbia Heights Metro directing people to Mt. Pleasant and Pleasant Plains. The sign used to say 14th Street southbound and northbound. While it's neat to see these neighborhoods mentioned, I think it might also confuse people, especially people who don't visit often.
For example, I could see people asking which way Columbia Heights is (of course, it's both ways). Also, Pleasant Plains isn't the most familiar place to people, so that might be confusing. Then again, it's a real neighborhood, and as the person who sent it to me said, "Now I might be able to tell people I live in Pleasant Plains and they might have heard of it." And as he also noted, it's also bit far from the Metro station. Of course, that depends on who you ask.