Am guessing that your 20x20 tower was straddling the waterfall there and not spreading into or covering parts of the neaby ‘Ruins of Velstad’, or the path of the bear ghoost, or its activation point, and that moves from the ruins towards the Godsclaw Passage and the chest along the way?
For what it is worth, when on a PvP server it is often a good idea to take screenshots of your base from different angles just in case of the very regrettable situation your build is reported for any reason. It is also useful to screenshot (where possible) message interactions between you and other players on the server.
Clans may (do) take advantage of the fact that there are a Lot of PvP servers out there and that it is not easy to track and monitor hourly players actions, etc. Even on modded,private servers it is hard to keep track of these things whilst using admin mods.
I do wish that FC staff had a backend copy of the most used admin mod running on all servers as it would certainly help FC staff keeping track of things. Of course it would not be worth the cost and hours of work.
Copying and pasting screenshots to this forum is not hard. Do those in-progress screenshots and keep track of those messages with clans. They are useful to both FC moderators and to the general community should they be asked for.
Lastly, check the link from Funcom regarding types of builds that will attract attention: