Bamaranger,
Actually, illegal tactics aren't really needed to kill coyotes.
E-callers are legal here in Arizona, and while I've used them, I usually have better luck with hand calls. Night hunting for coyotes is illegal here, but I've never needed to call at night. Early and late in the day do just fine for me, and I've even called them in at mid-day.
Noise isn't as much a problem as movement on a stand, but you don't want metalic clunks and bumps happening. The wind can be an issue, but not if you use a coyotes habits to your advantage. Set up to cover the downwind side, and shoot the coyote before it smells you.
As far as "sounds" to use, learn to use a howler effectively. This time of year, I've howled in a lot of coyotes that were essentially ignoring the rabbit on the e-caller that was playing in the background. They were looking for the new coyote on the block, and couldn't have cared less about the injured rabbit.
To call coyotes effectively, learn to know how they think. Illegal activities aren't needed, except by those who are unwilling to learn coyotes' habits.
I still remember the first coyotes I howled in. A buddy and I were out calling one evening, and the wind was blowing a bit. On the first stand, we used his e-caller (foxpro) with a rabbit distress of some kind. Nothing appeared, so after 15 minutes or so I howled a few times. I got some response from maybe a mile away, so we quit and headed that direction.
We set up again in a shallow canyon, and again let the e-caller/rabbit distress play for a bit before I howled (15 minutes or so). This time when I howled, I got a response from maybe 1/4 mile away. There were at least 4 yipping back at me, so I played along with them, just howling the same way they were doing. When they finally shut up, so did I. I waited a minute or so, and howled again. This time they were closer; maybe 200 yards.
I howled along with them for a few seconds,and then quit. After another minute or so, I howled once, waited a few seconds, and then started with a coyote distress yelp or three. That's when 4 coyotes charged out of the brushline ~100 yards away. They charged right past the e-caller/rabbit distress without giving it a single pause or glance, and came straight at me and my partner.
I was using a cow-horn howler made by Rich Cronk, and I've since added another made from some buffalo horn I sent to him.
The only ones that resort to illegal activities are those who are anxious for a kill, yet never learn to hunt.
Daryl