Yes, HLG isnt just to "win". It's all for the fun, looking for the spots with a group of friends and discovering something new to show the YouTube community is always the best. Besides all that, it's just ridiculously fun actually using these spots in game messing with the other team. As you said, the other team rages and it's fun to hear. I gotta say, i've been doing this since 2007, and not once have i considered quitting. HLG is one of the best things to do on XBL. For people who don't like it, and say it's "cheating", well open your minds a little and grow up. Playing Halo, actually, playing xbox in general is all for the fun, so why not create a new way of having fun that many can't do?
Well I gave my 2cents, enjoy the video guys :D