@ctrl alt del-
Is it a bad thing for people to be mekayem a mitzvah dilegently?
As for your tehillim hypothesis, depending on what shitta, Nisht Pashut. Would you say that about someone who doesn’t hear the megillah and reads tehillim?
What do you mean by “mandatory reporter?” I don’t claim to know how Hashem will judge after 120 but I wouldn’t be so confident that you are doing the right thing by reporting people to the police. Not at all. Especially since dinah dmalchusa dinah may not mean that you have a chiyuv to follow the laws, rather that the government has a right to take taxes, fines etc.