They’re private eyes in the skies. Investigators are taking drones to new heights — using the remote-controlled aircraft to catch New Yorkers cheating on spouses, lying about disabilities and endangering their kids. “People want you to believe there’s all this negativity associated with drones . . . but they could be a very helpful tool,” said Olwyn Triggs, a gumshoe for 23 years and president of Professional Investigators Network Inc. in Glen Cove, LI. Triggs recently used a drone to find an upstate man suspected of insurance fraud.