Will Google editors ever visit my site?

The answer is yes. And no. They might.

The more successful your site becomes, the higher the chance that a competitor might report it for something that might not even be worth looking at..

Yet editors do come by from time to time.

Editors will do a quick scan to see whether or not the reason for your high rankings could be something that Google frowns on, or if indeed your site provides a good search result for the keywords it ranks for.

Before you get paranoid, let me show you an example of a high profile site using blackhat:
All of the dentists.com pages have dotted lines in between the listings. The lines are not lines as you can see in the html code.
They are keyword spam and the purpose of doing it is that Dentists.com wants to rank highest whenever someone googles a specific dentist’s name.
This is blackhat and I’m sure that editors have been made aware of it, yet it isn’t something that gets them penalized or banned mainly because Google figures that overall the site provides targetted results for web searchers.
However, you never know what an editor might do with your site, so you always need to evaluate the risk you are taking.
If you have ONE main site which carries your business, my recommendation is to play it cool.
~ Mike