Well it's not clear from Bert's posts how he found the email addresses for these companies. He could have searched Google for example and found their legitamate email addresses and not invited the spammer's attention.

Even if that is the case, I'm not sure it would do one ounce of good. I'm sure these companies have a good idea of what goes on already and are mightily pissed off with spammers who I'd speculate would, if they are selling goods, may not even be selling thier goods but cheap fakes say made in China.

As for enganging the spammers. I think John's already said it all.