tedster - 8:58 pm on Jun 15, 2012 (gmt 0)

If by "no blackhat" you mean not trying to test the edge of the envelope at all, I'd say that depends on your taste for risk. However, I would not risk any valuable site on testing tactics that Google has clearly shown they will punish when they detect them. There are too many good marketing methods that have benefits far beyond search - like with your end users!