So, let’s define an Yid who lives safely avoiding major sins according to anyone.
First, he should not be angry at all. That’s by all opinions A’Z. 2nd, he should not disparage any other group of Yidden who are shomer shabbos by some opinion because they are in danger of a cherem if that other group is announced kosher.
Is eating treif a biggie? Is there a shechita that is kosher by all opinions? super-glatt.
Hametz on Pesach is a thing. Luckily, Mishna tells us not to worry about mice from neighbors, otherwise there will be no end.
How many times we would need to read zecher Amalek to satisfy all opinions? And will we violate tircha detzibura by some opinions while doing that?