I don't think what's best for the equipment is generally best for the staff or vice versa.I would divide the room into two areas with some soundproofing and ideally glass in between.
Make the equipment side a bunch of shelves on racks with modular cabling into the staff area. Have commonly used infrastructure in the racks (KVMs, DHCP servers, power distribution file servers for images etc.) Make sure that there are plenty of well labeled/colored cables available and a means to store them conveniently. The equipment area needs to anti-static and drink/food free and well lit. The staff area may need to be warmer than the equipment area (arguments seem to rage over this) and permit snacks and sodas, have more friendly lighting.
Depending on what you will be doing you may want to consider a third, more secure area for whenever you need to impress a customer with your ability to keep their stuff separate, I would at least plan that the equipment area might be sub-divided by a cage later.
Your sense of morality may have come from your religion, but your religion got it from a human, probably the parents of whoever made it up who got it from their parents and so on as humans developed it over time. I disagree with you and I think you will find that the vast majority of values you hold are shared with families and people of all faiths or the lack thereof, and that there is plenty we can agree upon to base a legal system without involving a deity.
If you're waiting for 100% agreement on anything you'll be waiting a long time, but I think you underestimate the proportion of people worldwide that would agree on whether murder, stealing, fraud, deception etc. should be subject to legal penalty, the broad circumstances under which the penalties should apply and the relative seriousness of crimes.
I just don't see how you can go through life with so little faith in the humanity of your fellow man.
I have not heard anything yet about the size or concealment of the IEDs used. Presumably they were quite large and had been in place for a short while, perhaps hidden in storm drains or garbage cans or mailboxes or backpacks. If so, then that's what the security team can look for, I believe they even have explosives sniffing dogs and presumably some kind of explosive sniffing technology could be developed. They could presumably also set up HD video cameras along the event route for a couple of weeks before the event and then take them down when the event is over.
This story is still unfolding it seems a shame that it has now scrolled to yesterdays news on slashdot. It would be good to be able to vote it back to being current and to be able to see the comments stacked in reverse cronology. I know everyone has their own favorite bitch about the slashdot UI, but this is a good example of a story that suffers from it.
So embed some random nonce into the executable and tell them it's their credit card data
I do like your idea of embedding malware and threatening to unleash it if theft is detected.
I'm only joking by the way, but this is fun...
Besides the lack of GPIO/SPI/I2c is a huge deal, it cuts out a lot of hardware tinkering.