But then why not just make the shortcut to the game inconvenient to access (hide it in a folder in a folder in a folder) or just plain uninstall the game (adds the extra step of reinstalling to play).
2) It's not about abstaining from the game, its about playing a healthy amount. Reinstalling the game daily isn't going to teach you not to play all night, it's going teach you to not uninstall the game every night after your session.
I can edit my hosts file to point facebook.com to 127.0.0.1 in general, but it's even more trivial to get rid of it when i do want to check facebook (not that i crave it that much anyway)....