At the very least I'd filter the obvious ones from coming in, like the private addresses and the multicast range if you aren't expecting multicast inbound. The thing with the bogon route filtering is you have to keep on top of updates from IANA, otherwise you could end up blocking legitimate networks.
interesing!, another idea I suggest in the case of private adressing is the use of distribute list, both works, but at internet edge routers, null routes are a must.
