I nearly missed a flight in France despite being early. I asked for a hand inspection and I was made to wait, and wait then then wait some more. I realised I was going to miss my flight. Then they said I needed to fill in a police report and that the films would be scanned anyway. The hand inspection also involved opening every box AND the foil wrapping, at which point I told them to stop.
1) Don't bother trying to reason with a French airport guy
2) Just scan your film and move along
I do use the lead bags and wrap my film in two of them. Those have never been treated as suspect and have never been inspected.