You can review the linked thread below for examples of landclaim abuse.
In most cases people who are not aware they did anything wrong get hooked on the “decorative landclaim” section.
So if your base was significantly larger than needed… contained outer decoration like separate foundations with torches… or it was a mini-village in some RP style with several houses “for thralls” etc. then that would qualify as decorative landclaim - essentially claiming more land than you need for core gameplay.
Official servers don’t approve that kind of playstyle as they’re trying to make sure it can house as many players as possible and they all need a space for their base. Ofc staff only takes action if someone actually reported you or someone nearby as they don’t go looking unless there’s a report, like others above said.