My easy way of avoiding the Swiss toll is to pretend it doesn't exist. I've driven into CH many, many times with rental cars from other countries and a couple of times with my own car. I've never had a problem.

One time I went through a very lightly used Swiss border checkpoint and the guard asked me a bunch of questions and looked at my passport. But I think he was just bored and eventually he waved me through. I was driving a French Avis Mercedes.