Sure we have. Even with a good spam filter, some of these "lotteries" and pleas for money from Nigeria (worst offender I think) slither through. I report them as spam and I'm sure all of you do as well.
However, as my friend PI in Great Britain wrote today, some people, especially seniors with little internet experience, are being taken in. Even people such as her friend, a retiree with extensive business experience, was duped.
One of her commenters included a link to Spam Baiters whose primary mission is to make life miserable for spammers. I'm not sure I'd want to spend my time communicating with the spammers to spam them right back but the site has much valuable information about these online "confidence men (or women)" and how to recognize and combat them.
Some of you may know someone who might not recognize the Lottery emails and the heart rendering pleas for money as fraud. If you do, pass this on.
If something sounds too good to be true, it usually is.