Board Thread:Suggestions forum/@comment-37102408-20181124121756/@comment-37105233-20181129211748

Really good suggestion. The details still need to be ironed out though.

Firstly, this is one of those things that could either be really simple to code or near impossible so that's one important hurdle to pass.

Secondly, as Crimson099172 said, re-counquerability is a bit of an issue. I don't think defending invasions is a good solution, since you could just close all the doors and be essentially invincible.

A fantastic solution to this can be found in this suggestion from a while ago. In short it proposes that banners have an upkeep that should be paid regularly for the banner to keep functioning. If the upkeep is not paid, the banner can be broken by anyone, who can then replace the banner with one of their own and claim that build.