FWIW - I suspect the "IP reputation" site you referenced is utter bullshit when it comes to its "Proxy Detection". Looking at my own residential public address it calls it a 'low risk proxy' when I can assure that it most definitely is not. It doesn't help that their explanation for how they attempt to detect this is a pile of marketing word salad. I don't expect them to be completely transparent to their methodology, but they should make some attempt at presenting a bit of technical background.