A few days ago, I blogged about something I had said regarding spam. Basically, I said if people didn’t reply to spam, we wouldn’t be spammed; it is extremely cost effective for spammers.

I happened to find this from Arnold Kling at Tech Central Station:

Similarly, on the problem of unsolicited email, I have frequently pointed out that consumers who purchase from spammers are at fault. I have seen references to a Pew Research study indicating that "7 percent of emailers — or approximately 8 million people — say that they have ordered a product or service that was offered in an unsolicited email." Another report puts the number at 4 percent, which is still a lot of people supporting spam. If you want to know why you receive so much junk email, that statistic explains it.

I can’t really claim this is a supporting argument, since I think I probably had seen him write this before and have clarified (and strengthened) my view based on his analysis.