In most cases shooters are not the ones dumping trash. It's tweakers and Mexicans who don't want to pay dump fees. Then the shooters do what they shouldn't do to begin with - shoot it. I mean I can't really blame them, the trash is already there.
The trash is just an excuse to crack down. If it was a tent camp with piles of trash strewn everywhere, or a broken down RV, they'd be just fine with it.
And shooting close to roads etc. Well no fucking shit when the state keeps gating off public lands where shooting would normally be legal, and making it impossible for people to access it.
The number of formerly accessible forest roads that have been gated off and blocked with root balls/barriers/etc in the past 20 years is insane. I can't count the number of places that I used to be able to go to, which are now closed off unless you're willing to hike or bike miles in - and if you want to ride a dirt bike or ATV in instead, forget it because they've all been posted "no motorized vehicles" as well.
I've tossed around the idea of putting a gas or E bike kit on an old mountain bike frame just to get around that bullshit.