Mike, those are some good points.

Perhaps a piece of strut would serve as a tie-off for the cords, and help protect the plugs from strain should someone trip on a cord. Something like this:
[Linked Image from electrical-photos.com]
Just wrap the cord around the strup on its' way to the outlet.


As for the receptacles themselves, perhaps this wpould be a better solution:
[Linked Image from electrical-photos.com]