Again... If folks were to implement explicit prefix filtering *everywhere* it wouldn't be necessary to filter only bogons and other miscellany explicitly. Something of this sort would only "lower the lazy bar" (is it possible?) for the clueless and/or lazy (those which Rob's list currently accommodates, which is better than nothing, BUT.. -- no offense Rob, I'm pretty sure our beliefs are aligned here :-). If folks want to filter, please, please, PLEASE, employ IRR infrastructure and filter customers *AND* peers explicitly. If your vendors have issues with this, push them to fix it. Then you don't have to worry about bogons, max-prefixes, route hijacking, de-aggregation, or... Then we can worry about IRR infrastructure hardening and accuracy and derive explicit data plane filters from the output, as well as other tangible benefits. Is it really that hard? -danny