So, this thread has absolutely nothing to do with Activity levels of players. There's some really good discussion going on about it, but perhaps it ought to be split out to a different thread.
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As for the idea of getting rid of inactive Lords squatting in regions, Are you serious? There isn't an island that doesn't have at least one realm where there's a shortage of lords. Have you looked at Tara lately? Squatting lords are a blessing in some places.
I think this is a thorny, difficult to solve "problem" that isn't really a problem, and doesn't need any resources spent on it right now.