It should be legal to kill someone if they...
...insist on using fresh hot water for every pan, fork or plate they are washing while you're in the shower, so the hot water cuts out every four seconds.
It should be even more legal to kill someone if they just plain refuse to quit it. Selfish bitch.
But then, anyone whose desktop wallpaper is blue with a centred picture of herself must be mentally unstable. Especially since I wouldn't want to look at that mug if you paid me. Maybe it's the ultimate anti-procrastination tool.