Non motorized BC users of an area do not want to hear the exhaust note of a trials bike however muted it might be or see the tracks or garbage that gets left or be around motorized BC users which motorized users just can't seem to grasp, you may even be right on the footprint but non-motorized is non-motorized … thems the rules
Where to start, since you mentioned rules….I hike, mtb, run, camp, moto trials and dirt bike all in the back country. I'm really glad in our free country that the Forest Range and Practices Act indicates that Crown land is for everyone and all forms of legal recreation. You may not like it but even a Section 56 trail status does not exclude other user groups from using the specified trail or area. Parks are governed differently and so it should be. In some Class A parks mountain bikes are even excluded….gasp…
I regularly clean up MTB trail garbage in my local maintenance rounds so don't be mislead that somehow the MTB'ers are the cleanest of folk. I also clean up after moto users but far less frequently. Of course I don't frequent gravel pits where motorized do the most garbage damage…
How about this, ride where you want, smile to the other user groups you see that are behaving well, perhaps even wave. Report the ones doing something wrong and move on. Read up on Marin County in California. Things can backfire.
….and no…I'm not sponsored