Signed Integers Considered Stupid

Signed integers have always bugged me. I've seen quite a bit of signed integer overuse in C#, but it is most egregious when dealing with C/C++ libraries that, for some reason, insist on using for(int i = 0; i < 5; ++i). Why would you ever write that? i cannot possibly be negative and for that matter shouldn't be negative, ever. Use for(unsigned int i = 0; i < 5; ++i), for crying out loud.