No. It won't help anything. If your computer is idling it won't be turbo boosting anyway, so there's no point to installing something to disable turbo boost when you're away from the computer. That's not how it works.
No. It will not be idling because I am still going to remote access it to do my work. Just that when I am away from desk, the cooling facility of the room such as an external fan is likely not be available.