kraktus
commented
11 months ago Hello, there is already such a system in place for people leaving their time run, although it's not publicly displayed. After a specific number of games aborted/left, they will receive a playban which increase the more often the behaviour happens.
https://lichess.org/forum/lichess-feedback/feature-idea-karma-rating Here is a site which use it and which is very friendly : https://boardgamearena.com/ I think the forum post already say all