QUOTE(Farelf @ Feb 9 2007, 11:48 PM)

Those who get a lot of spam quite possibly have different "flavors" of spam, and they change. Your 40% incidence is very, very high compared to what I see. I get different flavors at work and at home, I can only (conveniently) check my home flavor at the moment and found only one instance in 103 before I ran out of puff. All I can say with confidence is that my occurrences seem to be comparatively rare. And it's my recollection the same applies to the stuff at work.
Not wanting to spook you or anything, there are many, many places where spammers could inject traces if they wanted to, including those apparently random "prefixes". These is no persuasive evidence either way. I hasten to admit that the occasional broken spam I see has, indeed, included unexecuted code indicating a random selection from a list is made for that part. A better way, from the spammer's point of view, would simply be to code the From: (which, somewhat controvertially and last I heard, is never munged anyway, even if it has your *whole* email address in it). Makes me think they're not really trying to trace, certainly not in any obvious way.
Notwithstanding all of that and as you say, it would be logical to extend the munging in such an obvious way as you ask but I think "doesn't care" is an unduly bleak interpretation of what SC's regard for the proposition might be when and if it is considered. I can see no reason why your request couldn't be obliged, when priorities permit. Incidentally I send munged SC reports from home and manual, unmunged reports from work. I have just about convinced myself to allow (unmunged) SC reports to those who don't accept munged reports. Many reporters don't munge at all and appear to suffer no bad consequences. But I am very aware of the "flavors" thing. No-one could be sure all of "your" spammers are as indifferent to challenge and or cleaning lists as the greater majority appear to be.
Bottom line, FWIW I think your request has merit and please don't be disconsolate if not everyone shares your urgent concern. Despite those of contrary inclination (or indifference), I'm sure there are many other reporters who would like "full munging" too.
I use spamcop primarily to parse my email and secondly to report spam. I am not one who uses SC to "attract" and "punish" spammers, although I do like it.

I am not an "activist" so to speak.
Still, if SC does not consider a more careful parsing of the "To:" in an email, I will start moving my main email address from the current SC to another hidden address. I never considered my SC email address to be anything other than a spam-free address, which it is, in the main. But if SC doesn't keep it hidden, then eventually I will not be using their system as my primary email address, but rather another one which receives little spam.
This is not to SC's advantage, since they want lots of spam, for financial reasons, but nevertheless, it is certainly not in my favor.