1 Stego + 20 C4 = FOB getting built lol. You would waste more resources doing this than learning how to build properly/strategically.
There are many things that block other players building but do not block spawns, such as gates, spikes, boxes, campfires, standing torches, cages, crop plots and signs. Most new players start on a beach, so stop using beaches for resources, if a base does not decay after a while, the people are still playing and can be asked to move. Remember, OTHER PEOPLE PLAY THIS GAME TOO. Any land blocking, for any reason including the common 'preserving spawns' BS is just a selfish playerbase on PVE.
Pillar spam on PVP is pointless most large tribes use a combination of dino gates, spikes, foundations and signs.
Start a tribe, place your 5 build boxes in strategic locations, ally with a friend. Start a new character on the server, rinse and repeat until the server is fully locked.
Plus on PVP the build box would be a very valuable thing to protect as it would prevent FOBs being pushed forward, defensive structures whilst attacking etc.
Or mega tribes could just get, say 20 people on a server, all place their 5 build boxes, therefore preventing people from counter FOBs etc and allowing server ownership rather quickly.
Also, THERE IS NO MEAT SHORTAGE ITS CALLED THE SEA YOU IDIOTS, MY TUSO HAS ALWAYS OUT-PERFORMED MY GIGAS ON MEAT RUNS.