This is important - http://daeken.com/the-hardware-hacker-manifesto
We live in a world of limits. The limits to the external world are important. I live in the country, and I am limited to how much noise I can make as it effects my neighbours. I can't make my own radio transmitter to transmit in a licensed range. These things are reasonable.
But if I want to pull apart and repair my lawnmower - that is my right !
As example above: if I want to change the oil in my car, it is my right !
If I want to pull apart a mouse, use the parts to control a remote control car - it is my mouse, I can do with it what ever I like !