The difference being is that trails are always a community effort, its not something that is privately owned. (except in rare cases)
Every set of trails I have built, I look at it like a community service endeavor. There is no way you can keep a public place private, and its always going to blow up. Just be respectful and others will respect you in turn.
I bet you guys act like a bouncer at a club, grilling every new face with 20 questions and judging them before they even give you a chance to show you their character. When a new face rolls up to one of my spots I greet them casually, let them know any of the rules if there are any, and tell them to fix anything they break.
Numerous times I have shown up to my own trails to see a new face there, barring the little disrespectful kids that turn every jump into a table top it has never been a problem. BMX is a community and a brotherhood, as far as I am concerned, anyone on a BMX bike is a friend until proven otherwise.
yeah but you openly admitted that you have know clue which community of riders built those trails. you aren't included in that specific community and you put no effort forth in building said trails. just because you're cool with random heroes blowing up your spot doesn't mean this group of guys feel the same way.
if i know someone well enough and trust their judgment, they're allowed to bring whoever they want to the trails whether or not i know them. i dig alone and have no help so when a stranger takes it upon themselves to ride my hard work without putting in any shovel time i get upset.
if bmx was such a brotherhood, nobody should have to lock up their trails to keep them safe and protected from guys that blowout lips and skid around berms and then not have the common courtesy to fix it. now, i'm not saying you're like that but that's the only experience i have with strangers coming to my spot.