Follows the interesting opinion of Paulo Coelho. Have a look:
10. The instruction manual is mostly wishful thinking.
9. Even after you've turned them on, they just sit there waiting for you to make the next move.
8. Incorrectly worded commands are completely ignored, or worse, taken literally.
7. They reveal all your secrets to anyone who wants to know.
6. Upgrades react badly to things left behind by previous versions.
5. Rules are absolute and there is no possibility of compromise.
4. Whatever you buy for them, there will always be a newer version that they want.
3. Nothing is ever "really" deleted... obsolete files will be brought up out of nowhere just to annoy you.
2. Error messages always translate to: "Well if you don't know I'm not going to tell you."
1. Despite your best efforts to prevent it, they continue to permit unauthorized entry.