Can you think of *ANY* that are remotely feasible on matters that a 911 emergency response team would be dispatched to?
Absolutely, Joe Paranoid is sure the government is listening in on his conversations, so he gets a NSI phone to protect himself from Big Brother. Later he sees a bad pile up on the highway and tries to phone it in.
Why would someone reporting that somebody is having a heart attack be less likely to report it if they knew that their identity was more likely known?
Because they're worried about picking up a fine like their buddy, Thad did. Thad was just asking where the ABC store was. If they'll fine you for that, who knows what else they'll fine you for.
That's been my point all along. You can't really crack down on casual 911 abuse, except in egregious cases, because otherwise you scare people away from legitimate use. You don't want any such considerations getting in the way of someone's life.
While actually holding people accountable, even if you don't necessarily always issue the fine, at least to some extent diminishes the number of abuses that would otherwise certainly occur.
But it would create other problems. And I'm just not seeing here a sufficient reason to block NSI phones unless there really is a lot of abuse coming from these phones. Most people are complaining about things like butt-dialing or people trying to solve mundane, non-emergency problems which is not exclusive to these phones.