It's more work with destroying the laser to disable it and placing it again. First off, you need to remember the laser's connections. Then, you might not remember where to place the laser after you destroy it.

To as why I think this is a good feature and as how this might be applicable, I think creating a visual representation is more understandable than just text, so here:

Machine 1
Laser 1
||   <- connections
Laser 2
CF Source
||
Laser 3
Machine 2

Machine 1 might be using all the CF that Machine 2 needs from the source, so one can just disable Laser 1 so that Laser 3 will gain all the CF instead of Laser 1.

Just a suggestion.