Admins can see land claims and most don't like when players land claim POI's (Like loot POI's, working stiffs,popnpills,ect.) but each server has its own set of rules, they can very quickly teleport to the location and remove those land claims, and in my experience I have not seen very much POI land claiming except for players making a base inside them, occasionally I came across people who land claimed them for competitive reasons, making it only 1 land claim was a horrible idea even if it was meant to prevent stuff like this, honestly that won't stop griefing and most of them are likely to just teleport to your base and just blow it up/remove your land claims, ect.
What we need are more tools that actually help admins with policing their server, right now they can't even clip underground to see players trying to explot the X-ray glitch and can't go invisible last I remember so how are they supposed to catch any cheating players in the act?
Yep, that should have kept the cost for land claims behind something like 50 or 100 steel imo. you never have a reason to really make more than a few in single player, in multi we really need unlimited, adjusting the cost of them is also something admin can do, the only problem with making them 50/100 steel is with the new game players can potentially lose their land claim when they spawn in depending on the server they are on, they could run across a player who will snipe them for a free land claim, which usually causes them to quit the server on the spot.
If not you have a player that cannot make land claim protection for themselves till level 35+ post patch.
If land claims prevent zed spawning, you can just make it so only bed roll prevents zed spawn after 10-15 minutes of laying it and remove land claims from affecting anything spawning in multi.