If you are not a qualified teacher, then please don’t insult teachers with your faux-insight into what the craft is. If you can’t write code, don’t tell the programmer what structure is. If you’re not a designer — don’t lecture others on what good design can be. If you’ve never taken a risk with your own money — don’t talk about entrepreneurship. The Internet has become a twisted fantasy where it’s perfectly fine to ask “who the hell are you to be telling me anything”.