Sure detecting spamming connections is always desirable. I guess the challenge would be to decide what is the better alternative. Disconnect the faster better connected host that send to much data (no spam) for others but maybe not for you or to disconnect the slower host on the edge of the network.

Its always good to have a mix of almost equally weaker and stronger connections around you, to achieve this, looking at message drops because of congestions in a certain time frame might not be such a bad solution and likely a much more easier solution to implement then a complicated algorithm. Why not check out first how the time frame approach will improve things already?

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