Blr creeps

My gf is a cabin crew and today on her way to the airport, she noticed some 50yos inside an auto next to her cab staring. They started recording her and making vulgur signs. After a while they tapped on her cab's door twice asking her to come outside. She got their faces on camera but couldn't get the auto's number plate in the recording. Though it didn't bother them a bit and they continued this bs until the cab went ahead. She couldn't do much as it was a moving traffic and all this happened in a few minutes.