I think that this is fair enough if two criteria are satisfied 1 That quotes are not used as a means unto themselves rather that they are used to support a point that is being made If you only include favourable quotes it reads like spam infomercial tv shopping and undermines reader confidence in the thing that is being advocated 2 That all quotes are referenced preferably to an online source this is a wikipedia requirement In other words by all means have a praise section but do not make it a list of spammy testimonial although you could of course include a referenced quote to back up a point that you are making Maybe the Praise section could more appropriately be called something like The Strengths of Waldorf Education