Was this really necessary? Isn't there already enough information available about train directions, etc., without sending some poor guy down to the train platform with a bullhorn? This guy may very well be one of the most valuable employees Metro has, but giving him this task it ridiculous, we think. If they need to provide extra help on July 4 and other "big" days, maybe the system should invest in a better PA system. Sending a guy down to the platform with a bullhorn is probably humiliating to him, annoying to most of us, and a huge waste.
By the way, this doesn't really look like a July 4 crowd to me as the video claims.