I'd join, but my parents don't want me downloading software. They think it'll slow down the computer.
Tell them that if you tell it not to run, it won't affect the computer's speed at all. You can define how much or little of the computer's memory it should use when it is running, and if no one's using the computer they won't notice that it's slowed down (if a piece of software runs in the forest and no one is there...).
I have not yet tried for example to use photoshop on a large image while also running the BOINC models, but since it will relinquish memory as needed, I don't think it would have an impact.
The last day or so, I've been letting it run while my laptop reads me a book (The Surgeon's Mate) and I knit. Why not use the capacity that's going unused?