I'd say yes and completely agree with the above posts, but the grey area of "how safe is *enter method here*" is getting obscene and too obvious. Have a peek through the forums...you'll see that many here have been affected by Google's update. If you're undeterred by the setbacks of what backlinking, spamming, spinning and whatnot has done to others and still wanting to backlink, do it like you're adding salt to your food: small amounts, do it carefully and pay VERY close attention to where you make your posts or comments.