As it gets darker, things get even stranger! In some cases, the crazies would make for a great "stay away from drugs" commercial. At least they seem to be there just to entertain and maybe make few bucks, not to cause any problems.
With that said the crazies and the chemically enhanced people all kind of add to the excitement of downtown LV. So different than the Strip.
Definitely a must see or visit on your trip to Vegas. If you come early, stay at least until it gets dark, have a few cheap drinks, and enjoy all the fun. People flying over your head, live bands, tons of weird people wanting to pose for pictures and lots of activity.