we had someone build right outside EC walls in world 6, which wasn't an issue per se, except that every faction often used our cr in order to attack one another, and the guy never built walls which is just as well as it would have then created a bigger issue due to potential of bubble wrapping a ram etc...but he didn't last long, because he couldn't really do much outside a large village and eventually left. but he certainly didn't think anything of it...he was also a very messy neighbour...
he/she obviously just wants to build a bond with you <3