Is your feature request related to a problem? Please describe.
Currently each player can have their own warp sign; the problem with this is that it means teams with more players can flood the /is warps list with 4 warp signs each, and players who have alts will have access to more warp signs for their island (additional promotion for island shops).
This can also lead to some islands being able to have massive amounts of warp signs if servers decide to allow islands have something like 8+ players in a team.
Describe the solution you'd like
A configuration option to make it so that only island owners can have a warp sign OR a per-team warp sign limit.