Hahaha, lol... nice joke.
No, don't go installing out of region Wads unless you want to make a n00b thread about: "hAlP, mY wII hAz BlAcK ScReEn"
NO DUDE! You're not supposed to install out of region NOTHING.
No WADS, No CHANNELS, No Themes, NOTHING.
I guess there's a work-around for that stuff, but I'm not familiar with the process.
If your Wii is an American Wii, install NTSC-U channels ONLY.
If your Wii is an European Wii, install PAL channels ONLY.
Same for Kor and Jap Wii's.
PS: If you're planning to install out of region channels despite being told NOT TO, then make a copy of your Nand first.