They could have at least taken their shoes off before they went stomping around up there. That's the problem with hippies they get everything dirty!
There are several "NO STEP" areas on wings. If they dented one of these areas, the taxpayers should bill these clowns for any damage. It won't be cheap either.
Otherwise, I hope the protesters purchased some Blue Angel memorabilia, some $4 pizza slices and enjoyed the jet truck performance....