Well, they're animals and there's nothing "wrong" with killing them any way you want...be it with a bow, a gun, or a slaughter house guillatine, as long it falls within the confines of the law so as not to cheat others out of having an equal crack at taking game.
But..."At what point do I lessen the hunt?"...the experience, the challenge...the reward. Every hunter has to decide what suits him, and at what point (if any) he feels he is cheating himself out a greater challenge or experience.
Some are happy with rifles. Others are content with the latest MQ-OU812 decked out with all the bells and whistles. Others don't feel challenged until they've got a recurve and aluminum arrows in their hand. Still others (me) prefer selfwood bows and doweled wooden arrows with steel points, 1920's style. A few don't feel alive unless they're using rawhide bowstrings and dogwood shoot arrows with sinew wrapped fletches and hafted stone points. (Ya ever make a set of well matched arrows from natural plant material, by the way? It's a real exercise. Makes you appreciate them a whoooole lot more than any pre-fab carbon on the market.)
I pondered that question for years shooting compounds. It's funny that you question laser rangefinders as an example of what may be too much technology. It was while pondering the decision to buy one years ago that I had a sudden revelation of, "Just what am I doing? What do I really want out of bowhunting?" I decided rangefinders and technology weren't it. I had been thinking of trying traditional for a while, but I remember the "rangefinder moment" as being the straw that broke the camel's back, prompting me impart a greater use of "myself" into hunting and to accept whatever limitations might be brought by not taking advantage of technology. That was my own choice, however, and if others enjoy the advantage of a rangefinder, that's great too.
The "where to draw a line" decision is personal, BUT it's also one that you MAY want others to follow as well. If you don't find baiting appealing for example, you may not want it to be legal for Billy Bob to pile up a mountain of corn in the adjacent back 40. There's a delicate balance act to be performed of what you want to do, and what you may or may not want others to do, while trying not to alienate them.
Back to rangefinders...I don't have a problem with them, but they're not my cup of tea. [Caution: Worm can opening...<img src=icon_smile_wink.gif border=0 align=middle> ] I do think there needs to be technological limits set on what can be used in various seasons though, so bowhunting remains bowhunting instead of turning into a game of "laser tag" or "sit in your easy chair and push a button to remotely kill a deer" 100 years from now...accurest, laser sights, gyroscopic stabilizers, speed (400fps mabey?) and similar cutting-edge and yet-to-come things that need to be nipped in the bud BEFORE they may become commonplace, so restricting them wouldn't alienate large groups of hunters already using them.