i see your point. lets stop here and do a boolean flag if we want (unlimited) recursive breadcrumb at all or no parent breadcrumbs (i am just afraid of the guy with the edge case having a real issue).

for the more fancy solution, we should move that into the base admin actually, as it makes sense for all tree content (routes come to mind...). i created https://github.com/sonata-project/SonataDoctrinePhpcrAdminBundle/issues/189 for that