Don't be worried about that too much...

I had some experiences with italian customs:

Once I had to dismount my Subwoofer and show them that there are NO drugs in it.
Once me and my friend who were with me had to empty all pockets and bags to show that we didn't smuggle something.
Often I have to show my driver's license and my car-registration cause they seem to think I must have stolen the car....

so don't wonder about things they are doing..