It doesn't matter. You are putting someone in trusted circle using some heuristics. Most trust relationships eventually forms delegation chain (A trusts B, B tr

It doesn't matter. You are putting someone in trusted circle using some heuristics. Most trust relationships eventually forms delegation chain (A trusts B, B trusts C, ...). All such chain degrades exponentially by some factor, however small it may be. This is why organizations with deep management hierarchies are so dysfunctional and inefficient.