Yes, it is so easy to enable this setting, they even keep sending us notifications to enable it. But once enabled, it is impossible to disable it.

It is a setting that let your power company to change your temperature settings when grid is under load. We wouldn’t mind it but they turned our heat way down during one freezing night while we were sleeping. Everyone woke up with cold next day.

The asymmetry in activating/deactivating may be because power companies discount rates (don't know if it is automatic or you have to contact the provider) for people with that setting active, and removing it dusqualifies you from the discount, so there is at least potentially an asymmetrical financial impact of toggling it one way vs the other.