Film
Whast happening for those of use that need to take film abroad.(Yes not everyone uses digital camers!)
Film put in teh hold will be ruined.
Leaving your expensive cameras in your hold baggage, tehre's always a chance it going to get nicked.
If film cannot be carried on as hold baggage, then that immedialty means a photographer cannot travel by plane . Not all places you visit will have the film you are after whether than be transparaency or print or be able to process it properly before you return.
I have no objections to camera gear being examined, in the past that has frequently happened .