I totally agree with those who get really annoyed when people block the walkway or escalator, or walk three or more abreast through the concourse. I think the Metro system in D.C. (where I lived until six months ago) may have finally broken down and installed "Stand Right, Walk Left" stickers on the escalators -- they resisted for a long time because "we don't want people to walk on the escalators at all because they might trip and fall and die," but in prime tourist season, I think the risk is much greater that a commuter will snap and throw some hapless visitor down to his death.

Ahem. Anyway, as a fast walker, even if I'm not technically in a hurry, I hate being subject to someone else's pace. It really frustrates me. I should probably get help for that...