Health is important, and should be looked at before anything else - or at least along with a weight training programme. Sure, to be reasonable, and level headed taking lots of protein shakes aren't going to kill you, but so many people take them thinking, or believing the hype and the advertising, and I just find that pretty sad.
Someone at my gym said "I'm not growing, but I've bought this really good protein...." - yet his diet was about enough to feed an anorexic flea. EAT MORE ****ING FOOD! IT's that simple, and stop doing bro curls in the mirror.
People think it comes over night - it takes years (well it took me years as I spent ages experimenting, learning and taking steps forward and back) to get some good decent size/progress. That's the problem, people are so impatient they want fast results.