1k tiles distance would be a good load of banners to go around, and it would certainly suck should the corresponding idol go *poof* for trying to exploit in this way.
In case you have a plan that works to prevent building donuts around other claims - or maybe even in general, so claimed lakes or private hunting grounds would be a thing of that past too (it might suck should one not be able to claim the wall first and the interior of a village later, but this tradeoff should be worth it) - I would say to go for it.