i think you need to just tell your friends to quit filming like they have tourettes. i think this with a gopro would be just as bad, i feel like the gopro is way too light. i have no problems with a ski pole. just mount the gopro on the end where the basket goes and hold it by the handle. the whole point of having a pole is so that your arm/pole act as a suspension system to basically eliminate any shake. small movements get lost in the weight of the pole by your hand keeping gopro movements steady and fluid. you can't hold the pole like you would grab a cliff rock climbing without a harness either tho.
this think looks too big for a gopro but not heavy enough to reduce any shakiness in my opinion. and with a pole you can get way closer and actually get in the action like gopros were built for. just my $0.02