Well, since you admit its a glitch, and it obviously gives you an edge since its necessary to use it instead of regular rafting...
Well, then may I direct you to section 2.2 in Nexons TOS
Competitive advantage, according to the company, its wrong.
Actually, river walking has little to do with rafting. It is not something you do instead, it is useful for other activities. Rafting is still best for what it is intended for: exploration exp, or the aqcuisition of the various rewards for turning in stars.
As for the TOS: so? You are still not one to say who is right or wrong. You are not given free reign to be rude to someone just because they are doing something against the TOS. If you think it will accomplish anything, then by all means report someone using the ticketing system if you witness them abusing a glitch. But being rude to them will still be wrong, and could possibly subject you to violation of TOS, harassing other players.
And, since we are focusing on competitive advantages: having to walk from point A to point B is recognized by nexon/devcat as a hindrence. as such they offer waxen wings and mount-type pets to facilitate travel. mounts are also noticably more expensive than other pets with similar inventory, combat stats, and summon time. Even more speedy travel is clearly made more expensive by a simple comparison of thoroughbred vs shire or eagle vs pelican. Clearly being able to travel more conveniently and or speedily is a competitive advantage.
Abusing housing coupons is faster than any pet, and uses less inventory space than a waxen wing, with unlimited uses. Competitive advantage there. So are you going to be reporting people you see asking for rides via this glitch?