אל תפרוש מין הציבור

The Pirkei Avot teaches us that one should not separate themselves from the community. The Pirkei Avot is the ethics of our fathers which means that it is meant for those who wish to go "beyond the letter of the law". I believe that this teaching of not separating yourself from the community applies even to those who don't go beyond the letter of the law but who wish to go by the law.