i doubt na may magchecheck ng laptop sa airport. Maliban nalang kung naaresto ka for serious criminal case at na confiscate yung gamit mo.
otherwise, this would violate privacy law.
Sa case ng jail broken iphones and android.. its totally legal, the phone is yours you can do pretty much anything na walang ninanakaw. Nagiging illegal lang kapag nag install ka ng pirated software, pagnanakaw na yun. pero once again, cellphones are private item.