IMHO what technique you use to win a fight is irrelevent. It could be a gouge, bite armbar or whatever. The technique is the final part of the puzzle and not the puzzle itself. I've shown a little bit of ground fighting to my Karate club and always stress that being in a good (dominant) position is more important than the way you chose to end the fight. Many times the way you finish the fight is just s much determined by the mistakes your opponent does rather than what you chose to do. Being dominant give you options while cutting down your opponents choices. Striving for a dominant position stacks the odds in your favour. For example if you gain the mount. From there you can hold on for dear life and wait for people to break it up. Or you can go for a choke or armlock (if you're only grappling), or you can add in punching to the face (for MMA) and finally you could fish-hook the guy and gouge out one of his eyes. All of those are possible outcomes or choices you can make because you are in the dominant position. By contrast the guy that is mounted only has two choices. He can try and escape to a better position or he can try and employ dirty tactics (a eye jab could theoretically win the fight from under mount. His choices are restricted while yours range from simple retraint right up to maiming for life. A double lapel choke is particularly bad for exposing the performer to eye gouges. Not something I'd try on the street personally. However things like the RNC and the triangle (or just plain dominating the guy physically) give you a high degree of protection from dirty tactics while also giving you a fairly free rein to employ them yourself.