I see lots of small stuff every year, usually blaze orange not being used. There have been 4 that I called in. One was one guy shooting 3 fork horn mule deer at one time. He got a fine 2 of the deer taken away. Turned in a local rancher in SE idaho for shooting a cow elk on city of rocks monument. Legal to hunt there but you can't drive off road, and can't use a cow tag on there...in particular when said cow tag is only good for hunting within a half mile of a green field. Closest legal green field was over 6 miles away. The wardens had been trying to catch up with these guys for a while...iirc they got busted for illegal take, shooting from a vehicle, over limit on elk, and shooting from a county road. Another couple guys for shooting a cow elk in Wyoming....that was 4 miles into Colorado. Final one was gross over the limit, out of season poaching by a cheyenne taxidermist...all trophy stuff. Troy Hall, real p.o.s.....and didn't get all he deserved or even caught for all the violations I knew about.
Only state I would consider not turning in a poacher would be Montana. Seems dumb to turn someone in for poaching an elk, shooting an extra one, etc when the landowners, legislature, and fwp just want them dead anyway. Sort of in line with fighting a wildfire in an area in August and then applying fire in October for a controlled burn...