Had the same experience with them around 3 years ago. It was just a fairly new resort back then.
We called it the Bawal Beach... bawal mag-ingay, bawal umupo sa ibang cottages, bawal magsaya.
What really pissed us off was that the guys who were "reprimanding" us had big guns on their shoulders.
I guess not much has changed since then. Tsktsktsk.