LMAO, I live "up here" like a couple of those posters, above the friendly border, I have either never had the coolant TB passage or bypassed it on most of my cars (My current DD a '98 Malibu doesn't deserve the attention

) I've NEVER experianced any freezing or other problems from this.
The only car I had stick open, and I'm not even sure it would be due to ambiant tempurature was my Mom's 1985 Hyundai Stellar, which was carburated, and under powered.