metrorail stations

This page has a great "prove you're human / not a spammer" test thingy at the bottom, although I fear it may be too difficult or confusing for some people, especially if they're from someplace without much public transportation. But maybe that's on purpose, as they only want locals to post comments.

https://ggwash.org/view/65334/topic-of-the-week-what-does-trick-or-treating-look-like-in-your-building-or-neighborhood

The question, and sometimes the map, changes each time you reload the page.
Even I'm not certain about some things (one question mentioned the "full time" yellow line; not sure what that means, or how one can see that on the map).