It's very cheap and easy to have secure online ordering. There is simply no excuse not to have it. It would be interesting to hear exactly why RComp have declined to offer this protection to customers, when it is standard on any Web site that requires you to enter credit card information.
VinceH, by the way, is absolutely correct. If a customer does not sign the receipt/enter his PIN then the seller becomes liable for any fraudulent transactions. As this is distance selling, the seller also has to offer greater consumer rights with regards to returning products (cooling off period) and so on.
By offering insecure payment facilities, RComp are simply exposing their customers and themselves to financial risk and legal headaches.