My experience in disc sports tells me that some will do anything to enrich themselves; this observation includes players at one time regarded as top professionals. It's merely human nature, but a true sportsman would never put himself above the game. His hierarchy of values prohibit it, as he is servant to the 'law'. That being said, we are all at differing points on the circle and we are all imperfect, so I leave 'judgement' to a higher power.
I suggest you learn more about the concept of gamesmanship - it is not a deliberate rule-breaking strategy, rather it is a deliberate use of the 'slop' areas in the rules to gain an 'unfair' advantage over one's opponents. Because rules are never actually broken, no infractions are called, but it reflects a disrespectful sleazy attitude on the part of practitioners, where they place themselves and their concerns first. Most people have played with fellows like this; the fellow who makes a noise at the critical moment - consistently, always seems to be standing in your peripheral vision, moving slightly, during a putt, trash-talkers, etc. In fact, I believe that's the reason some players use headphones nowadays, to eliminate or reduce some of these distractions. So no, people should NOT use ANY method that's within the rules that is advantageous. That being said, not every round one plays is a serious competitive round; lots of things are acceptable in casual rounds with friends you are familiar with - serious competition is not the only reason we play.
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