Here I go with another proposition: most dumb things people say/think about bodybuilding seem plausible or likely to them because there's some truth to it. Take for example the idea that protein shake is steroids. A lot of parents will believe it. It's not a stretch to think these ubiquitous powders are some form of enhancement, seen in the context of fit people using them. Another idea is that muscle turns to fat. If you have a science background, this would seem like total ignorance. However, people don't know the science. Also, discontinuation of weightlifting, with or without steroids, and reversion to poor diet can leave loose skin where the muscle has atrophied and the skin is loose now. I've also heard that working out legs is a bad idea because it will make your legs too big and your genitals will have no space to operate and receive blood flow/nutrients or whatever; and that as a result, your genitals will take on a reduced size.
Common sense leads to good theories sometimes. I would not be shocked if the package wasn't in synch due to the constraints in that area from leg work; at least it will look small probably - a side issue not related. Also been told that drinking protein shake while not working out will make you get fat; it's only for drinking if you workout. I explained the calorie concept and the ingestion of protein usually being healthy for muscle repair and most unlikely to be stored as fat. But people have in their mind these powders have loads of sugar and fat and will make you unhealthy. The fact of the matter is they might be thinking about weight gainer... bottles look similar, weight gainers have a well known reputation among people who've thought about gaining weight, and ultimately the weight gainer boxes recommend hundreds of grams of carbohydrates per massive serving. There's truth in misinformation. News media promote agendas on this principle. Some truth, some omissions and falsehoods, and a professional production messaging.
But word gets out that steroids shrink your testicles and people promote their personal understanding/lack thereof to propose theories. That's why I believe the dumbest things you'd hear would be misconceptions from those who don't participate much. Think about it: if we can recognize these things as manifestly erroneous thinking that turns the truth upside down, we must have some acquaintance with the crux of what people are trying to say.
Again, this shows our understanding reflected against misunderstanding. I've never heard something totally off the wall that would not serve as a basis for some kind of reasoning.
Finally, I've been desperate to gain muscle. I've read the magazines. I've bought the ideological filler ghostwritten on behalf of bodybuilders; the articles that propose x volume and supersetting like this, and so on re: how to build a big back following the strategy of ronnie coleman or build shoulders of dennis wolf using their methods. I have been a vessel of nonsense information, and at each time they were potentially true to me; I shifted eating practices, supplement intake, food choices, and absorbed the wishful thinking produced by articles on sophisticated workout regimens, believing that it would be the ticket to fast progression. You would be grateful if you learned early on as a lifter that the over-analysis of very minor things has almost negligible impact.
But there was a lot of good in those articles as well. The food ideas were the first I learned about quality foods vs hunger abating foods. I learned about exercises from exrx.net. I highly recommend it as a resource for selecting exercises and learning about ones you don't know.