There are cruise ship excursions that go to Pinel along with excursions sold on the island that go there also.
"cruisers" are how many of us (including myself) first visited the island. Like anyone else on vacation, some are decent and some are annoying but they have every right to visit Pinel, Orient or any other beach on the island.
Frankly, it is the actions of some island vacationers that attract the cruise ship crowds to Orient.
Personally, if I wanted to totally get away from SXM on a heavy cruise ship day I would go on a day trip to Anguilla.
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