Interesting article! Is it actually becoming "cool" to be a birder? "Middle-class flash mobs" and "twitching"? I'm definitely behind on the lingo.
As for the Darlington story, I also remember it as a goodwill gesture from the OPG - I don't think it's actually possible to trespass into that high security property. They were birders, not secret agents. Here's a quote from an article in the Toronto Star at the time: "Concerned about birders flocking to the off-limits site, Ontario Power Generation flew into action to organize an expedition on Sunday. Armed escorts took three busloads of security-checked spectators from across the province and northern U.S. for a once-in-a-lifetime closeup of the chicken look-alike."
I don't suppose Macleans meant any real harm with the looseness of the facts, but it did make birders sound a little foolhardy.