Forum Moderators: phranque
Red flags include the spam standards that anyone who's been in search for more than a few months knows very well -- including many types of doorway pages, mirror pages, satellite sites, automated submissions, and cross-linking between unrelated sites.
The only one here that is really bad is automated submissions. All other things are very valid SEO tactics. I guess I'm glad very few people understand SEO. I have to stop myself from posting all the time because it helps me for people to be very confused. There are so many old wives tales and superstitions out there in this field. I'm surprised he did not mention over op.