@Ghislaine
>82F while sleeping
>~28C
Are these people psychos?

A better recommendation for conserving energy, if it's a big issue, is to literally sleep with your windows open. However bad the heat might be outside during the day, chances are it will drop below their recommended temperature during the night.

But Technology Connections probably has the best idea: blast the AC to max during the night, when energy is usually cheaper. Make your house actually cold at night, so that the cold will last through the whole next day, without needing to keep the AC running during midday.
The best of both worlds. You stay cool, and you don't tax the energy grid when it is most stressed.