My Fox fork owners manual requires that the thickness of the drop-outs be measured every six months or 100 hours. That's to measure the wear on the lips that surround the skewer contact areas. They require that you replace the lower tubes if the lips get too thin. Smart those Fox folks. My wife's 7 year old RockShok has the same lip design.

In something like 4 years of using Avid mechanicals on three bikes, I've never had a skewer, external cam or internal cam, unscrew one iota. I ride a lot on steep single-track in N Georgia, E Tenn., and western N Carolina and some in Moab. After each ride I remove the front wheels to haul the bikes, so I would notice. Also, long before the skewer would release enough to lose a wheel, the wheel would have to wobble in the drop-outs. You'd notice it. Those lips are very pronounced.

These lips are very beefy and are obviously designed to counter the force from the disc brakes. Those of us who remove our wheels to transport the bike might be wise to loosen the Skewers a few extra turns to reduce the wear on the lips due to the frequent wheel removal/installation. Also measuring the drop-out thickness is a very good idea. The lower fork material on Fox forks is very soft and wears quickly.

Though the article claims that the fork manufacturers have ignored the problem, that appears to not be the case. Also, those pictures showing the bent fork just demonstrates that the fork was too weak in the first place to support a disc brake set-up. Poor design.

I have a ti cyclocross frame/fork for my road bike. The fork is designed for disc's and it's massive carbon fiber. It weighs at least twice what a typical road fork weighs and it's twice as thick. I run V's on it for weight savings.

A final point on loosening skewers-- I brake the Ned Overend way. I stay off the brakes until i
the need to scrub off a lot of speed than brake hard. That should loosen those skewers if they they are prone to do that and they haven't yet.

Al