Some chemicals are so dangerous that even experienced chemists hate to use them. Here's a real doozy. Diazomethane is an explosive, highly toxic gas, which is a carcinogen. It is made from another toxic carcinogen and the chemical that makes Drano work. Aside from that, it's just fine.
organic chemistry
There is no right answer to this question. That's because it depends on who you ask, a farmer or a chemist. And even then it's not always straightforward.
Gatorade needs a better marketing team. A very curious advertisement contained a diagram of an organic molecule that, if it actually existed, would probably be dangerous. You certainly wouldn't be drinking it.