As an instance, I had an interview with a CEO of a consulting firm. He took the interview while on the metro, so half the time on the call I couldn't hear what he said at all. When the call ended, I send a message to the HR person giving quite a critical feedback and stopping any further process with the company. A few months later I talked with one of my friend who worked there for 3 months. The CEO and the legal department overlooked some certain paperworks with regard to employment insurance, and when the taxman came and gave them a heavy fine, they hide the situation from everybody until the situation became unfixable. The company went bankrupt essentially overnight and most of the employees has a 1-year plus insurance gap with no practical way to sue for it back.
Moral of the story: if the interview feels wrong, email them and decline going forward right away. Give yourself the satisfaction of consciously dodging a bullet.