Addictive drugs

You're right that lots of things are harmful in great quantities, but that 
says nothing about their usefulness in smaller quantities. e.g. water is 
lethal if you drink enough of it. (Windows is lethal too, and what's worse 
the more you drink the more you think you have to drink, thanks to network 
effects. At least after you drink 8l of water you don't get the urge to 
drink *more*. Perhaps this is what RMS's rather unfortunate drug analogy 
related to, but if so, Ethernet is a drug ;) )