If one can see easily that someone hasn't logged in for past 24 hours and city has a maharaja palace, then raid. If we can "easily" see that few of the enemy players are inactive, maybe time time to hit them in gvg. Yes you can go to forgedb or some other site and find some of the info, but that takes time and effort.
One more time, and please read next time the Idea carefully:
Quote:
"Eg. yellow for inactivity over a week and red for over two weeks, and black for over a month."
1. Not 24h inactivity dot, but 1 week, so for GvG that does not help.
2. If someone plunder a Palace, and the owner not collect, then others cant plunder again until hi collect.
3. Inno are periodically exlude (every day) inactive players from hood, but CANT exlude from your Friend bar or Guild bar.
You see that new players poping up in that 2 week period in hood bar.
4. This inactivity dot is only that you can see and manage your friend bar, because in 1,2,3, years many your friends players not playing anymore.