So I have a general question:
If you are a religious Jew and you are in a non religious Jew's home on Sabbath and you mention that it is really hot and you would love to have an AC on and then you see your non religious friend reaching for the remote to turn on the AC. Should you do it instead of him? After all if not you technically caused a "גרמא בשבת" which was your fault and so the "chilul Sabbath" is on both of you. You for causing him to do it, him for doing it.
What is the ideal way to deal with such a situation?