Saudi Customs have ALWAYS had the option of checking computers, VHS, CD etc..... They used to confiscate these items for checking and you would get them back a couple of days later. This even applied to desktop computers brought into the country.
However, technology has moved since then and i personally havent seen them stress anyone out in years, especially since they installed x-ray machines.
So just accept that the rule is there, but do not expect long queues of people lining up for having electronic equipment inspected.
Mutt