tabbed washers aren't gonna keep your wheels from walking away, all they'll do is make sure they don't fall off if you forgot to tighten the nuts before picking up your bike...
the cotter pin seems to be the only thing on that page that would be any kind of detterent at all, everything else is adding a couple of seconds to the time it'll take to boost them...
i still think hose clamps over a QR lever is a pretty good option, but like the cottered bolts, it's not gonna stop anyone, just make them take a little longer...