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I recently re-staked mine when I mounted one of those Magpul ASAP plates, and it just wasn't that big of a deal.

I look at it as being kind of like safety-wiring stuff on a race-bike. You could locktite your brake caliper bolts, but what happens if they vibrate loose at 160 mph, setting up for Turn 8 at Willow Springs? With safety-wiring, you'll never have to worry about it.

Staking versus loctiting your castle nut is kind of like that.

We staked ours when we assembled our carbines, but only because a gunsmith said to do it. Blue Loctite would have been easier. That said, my son recently had to loosen his (I forget the reason why), and it wasn't that hard to do, and neither was restaking it when he was done. The staking job doesn't have to be massive; just enough to keep the nut from turning.

If you're that concerned about it, you could try safety wiring it. I used to have to safety wire lots of different items on my racebikes. It's not very "tactical," but if it will work to hold an A-10 or F-15 together, or to keep motorcycle brake caliper bolts from vibrating loose at 165 mph, it will hold the castle nut on an AR.