I don't care what you ride or how long you've been riding, when somebody greets you on the trail, give a friendly reply back. Don't be an asshole because you don't like what they are riding.
I later found out who this guy is through Strava :haha: that's another reason not to be a dick to other riders on the trail, especially if they are wearinga GoPro.
https://www.youtube.com/watch?v=02hN_SL_wU8