Neil it appears that you and your organization are taking an excellent proactive stance and work ethic against spam and UCE etc...
and you should be commended for that. the thing is, the SA community and the world at large should not be your free customer compliance labor force. we should be the excepetion to the rule in helping and i highly recommend internal metrics that meter & catch "junk" as it happens or thereabouts. you should know before we do. :-) that said, possibly you should educate the SA community to the specifics of your rulesets and proper scoring and why... at least provide a specific URL set to the list that educates the likes of us without watered down sales hype. otherwise it is possible many admins might or will continue to score as a "spammy" factor instead of a "hammy" or "less hammy" factor and possible defeat some of the dilligent and hard work your org is putting forth takr, - rh