OK on your points:
1. ER only has to stabilize, which often when nothing life threatening is tell them this is not an emergency follow up with your doctor, I have seen that many times. The same can be done on scene, we can make examination and if no life threatening illnesses or injuries send them POV to the ER or to follow up with their doctor.
2. Never said deny transport to those with a life threatening illness or injury. But patient calls about wanting a ride to the hospital for a cheap lunch, sorry we should say no. The same could be said with the I sneezed last week and now at 0300 I can't sleep so I want you to drive me to get checked, sorry no way.
3. DNR does not mean no treatment so bad on them. Now some patients have no transport in their living will, so service can still not transport unless a person with power of attorney over rides patient when patient is unable to communicate.