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Personally I wouldn't do it. No way. At the end of the day this would be very clearly against Google's terms (not to mention low-quality work), so effectively you'd be placing a bet with your site's reputation on if Google's engineers successfully catch you. If it's a business that wants to do well in the long term online, I wouldn't take the risk of a bet like that against someone like Google, who have 'one or two' decent engineers actively trying to catch this sort of thing. Pattern spotting is likely to catch you out and end up with you in hot water, it's just not worth the risk (in my opinion). As John points out, for a churn & burn website this may work I guess (not something I'd be involved in tbh!), but at the end of the day if you get caught, you're a bit screwed... Plus it'd just be contributing to more crappy content out there on the web - not something any of us need!