Osprey,
Perhaps it is where you are asking the questions. Jetties, piers, and some more accessible areas of the surf expose anglers to all kinds of questions from the general public, many of whom have no clue about fishing or any real interest. The tourists just want to strike up a conversation and kill some time, while wasting that of the angler. Anglers get tired of it and depending upon their tolerance get tight mouthed around anyone but their friends or individuals they recognize, unless the newbie happens to be wearing a bikini. The less the angler speaks in response to questions the quicker the intruder leaves (hopefully). Many anglers fish for peace, quiet, and relaxation...not to yack it up.
Perhaps you should switch tackle at least until you become better known by the locals, particularly if they are not fly fishing. If the anglers are fly anglers on the jetties and you have not had any luck getting info from them, then I can't explain it.
Some anglers just don't want intrusions or the conditions on a given day or at the moment you approach may be such that the fishing takes 100% concentration to keep from tangling in the rocks, tangling with a neighbor, or missing the less than frequent hit. I wouldn't take it personally. The same anglers in a different situation or at the end of a successful day might have completely different personalities.