Hey! My 20 year old sister is sobbing because I'm about to mod my wii! She said if its really safe, she wants you guys to say its safe to softmod a wii.
Or if you dont follow direct instructions, step by step.The safest way to softmod is to use ModMii.
And really the only way for something to go wrong is to have a power cut in the middle of modding. If you're really paranoid, use a UPS.