Park ranger: It is unfair to cite people for fishing in the newly restricted areas.
Conclusion (should = opinion)
We should do no more than issue a simple warning against fishing in the newly restricted areas until we've made a real effort to publicize the new restrictions.
Intermediate Conclusion
It's unfair to cite people for fishing in the newly restricted areas.
Intermediate Conclusion
They probably are unaware of the changes in regulations.
Evidence (since)
Even many of us who are supposed to enforce these changes have not yet been informed of them.
Evaluate
The city recently changed the rules on where you can fish. They haven't made a real effort to publicize the new restrictions yet, so the general public probably doesn't know where they're no longer allowed to fish. In fact, even some of the city's enforcement officials haven't yet been informed of all the changes to the rules.
So the author thinks it would be crazy to walk up to a dude fishing at 7am in the morning and write him a ticket for fishing in an illegal area.
FISHERMAN: What? I didn't know you can't fish in this area. I've fished here for years.
OFFICER: Yeah, we recently changed the rules, and this is one of the newly restricted areas.
FISHERMAN: Well, how was I supposed to know that? Have you publicized these new restrictions? What other areas are newly restricted?
OFFICER: No, we haven't made a real effort to publicize them yet, and actually I haven't yet been informed about all the new changes so I'm not sure what other areas are newly restricted.
FISHERMAN: Well, then, again how was I supposed to know? Can't you just let me off with a warning, instead of a citation?
Goal
We want a principle that will side with the fisherman. Something that sounds like,