The words "top notch" and "very sharp" are not the words that come to mind when I describe uniformed WDW security.
Barney Fife wannabe does though.
As for catching knives, even a broken clock is correct twice a day.
It's true that both OC and WDW Security use sniffer dogs at WDW.
Having gates has absolutely no effect, none, on who gets in. I guess it would slow someone down.
As long as you have an ID, which they don't examine anyway, and make up a good excuse for coming in, no one is refused entry.
Unless it's during a certain time of the year when parking is being restricted to resort guests only, anyone gets in.