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.
I think it is a combination of a bunch of factors but the main ones are:-lack of scouting/prep work so guys have one predetermined spot they are going to hunt so if there are already people there they have no backup plan and just set up on top of them-More hunters and less public land which is self explanatory-Sense of entitlement i.e. "I have been hunting this spot for years so I am going to hunt it even if you are already there"-Too much emphasis on trying to shoot a limit instead of the emphasis on an enjoyable experience in the duck blind. -Plain and simple laziness and/or being unprepared. This leads guys to show up at shooting time or later, hold down spots illegally, skybust at birds working other people...There are plenty more issues but even with everything mentioned above, I will continue to chase waterfowl because I have a passion for it. I have ran into my fair share of DB hunters but just remind myself why I am actually out there and try not to let it ruin my hunt. Life is far to short to let stupid stuff like that get under skin. I pick my battles and unless my immediate safety is compromised I generally just let things roll off my back as best as possible.