I had to abandon one account with an ISP. I used my correct email address in my early ventures onto the internet. The account attracted hoards of spam emails and... I had never bought anything online during those first few months on the internet. Only thing I had done was post on some usenet groups and an ISP's own forums.
Since concealing my email address the only spam I normally get is that which is sent to some newsgroups and email lists but not to a specific person.
Reg