I did "blackhat" back in 2006 and had about 500,000 pages indexed into Google. A few real queries and I saw my own site as the first few listings.
The 500,000 pages that I had indexed in Google were mostly mispellings/typo pages of the top 500,000 searched keywords in terms of volume.
So you can see statistically, it's very possible to come upon your own sites...
I did "blackhat" back in 2006 and had about 500,000 pages indexed into Google. A few real queries and I saw my own site as the first few listings.