Why? Because they sell cheap flip flops that e-ther burn or unleash some sort of flesh-eating bacteria on your feet. The bright side is that only part of your foot in contact with the flip flop straps are affected. If you want the flip flops that just sever your feet entirely, it'll cost you 40 cents more.
No, you don't have to thank me for linking you to some scabbed up feet just after you dinner. But if you actually read the story it seems that Wal-Mart is doing nothing about it.