Neglected Shell family trail signs

Just sent this to Shell customer service:
Some years ago, signs went up on Cheung Chau, marking family trail.

These signs since neglected - seemed no one cared about the trail. Some have gone I think, others defaced or illegible through ravages of time.

Now, maybe best if Shell could pay to remove the signs (or, maybe too optimistic of me, replace them - and ensure there's some maintenance).
shell family trail sign cheung chau