Doesn't raise any red flags for me. As someone else pointed out, it's trivial for someone to collect emails or find your email. Heck, this latest dump has 5 million of them...

E-mail addresses are not secrets and were never intended to act that way, so I don't care if they are harvested.

I operate several mailing lists that allow postings from non-subscribers, to addresses that are easily harvestable from the web. Yet, the "mean time between spams" is on the order of many months.

I also use my real e-mail address in the From: header of Usenet postings.

I simply don't have a problem with spam because of my mail server's terrific anti-spam setup.