My coworker just returned from a trip to Israel. He arrived at Tel Aviv airport via Delta flight and was selected for screening. They looked in his phantom DJI backpack case and saw the P3A. They asked how much it was. They knew what it was. He said he paid $799. Hey said its worth $ 1000 USD and said he had to pay tax on it even though he was leaving the country with it in a week. They then asked if he had the registration? I Guess there is somewhere you need to register it in Israel sort of like U.S. He said he didn't have it. They told him he would not be able to take it into Israel. They collected a refundable tax (around $150USD) and they kept the drone in customs hold at the airport complex. When he left he had to check in, tell them he needed to collect the drone, show the paperwork Israel customs gave him and then they showed up at the gate with paperwork for him to sign saying he is receiving his drone back. They never physically gave him back the drone. After he signed the paperwork they said they would put the backpack with drone on the plane. He actually didn't see the drone until he landed at ATL and grabbed his baggage to recheck it for the next flight. Ironically, when they confiscated the drone on entry he put the batteries in the backpack. the batteries were in the backpack when they returned it to him and they put it on the plane (with checked baggage). He mentioned it but they said they would not open the backpack and it went as it was packed.
So, be careful. Seems some don't have problems but some do. He was selected for screening coming in. If your not randomly selected I guess you will be fine. Otherwise make sure you have all the required paperwork. I plan to take mine to Israel next time I go so I was glad i got this helpful info from him. He ended up calling a couple of organizations in Israel they gave him numbers to but that ended up being no help. If I recall they told him to call the Israel Aero club? I think it was but no answer while he was in country. Just make sure you comply with whatever rules they have just in case they want to check you out.