People are banned today for minhagim such as wearing a spodik vs. a Straimel. You have the choice not to attend those minyanim.
I have a friend who once was thrown out of a (regular shul) minyan because he didn’t have a Hat & Jacket for davening. The people who make those rules will have to answer to God, not you
And I can assure you that there are some people when kicked out of a Kehila or shul for not conforming to some “Chumra” decide its all a farce ‘Ruled by Rabbis” and go OTD . I have heard people say this drove them away.