Free: Contests & Raffles.
I think poor etiquette has been happening for a long time. I think we just hear about it more now that we have more social media.
I really think that in the past few years the number of duck hunters has increased dramatically. Used to be you could roll up to the local spots at 4 and get just about any blind you wanted. Now it's like you have to be there by midnight or else you're screwed. Also I feel like some guys feed off of the competitive nature of waterfowl hunting. They like being the one to kill all the ducks when hunting the local refuge, and they will do anything to beat you there. I always try to shoot my limit and I can say this year there was no shortage of birds, especially mallards.