1. They're very vague. What's the definition of "knowing what you're doing"? They won't know that, they'll figure they KNOW that tubes must be placed in open areas.
This warnings helps of cource only against real noobs, those who yet don't know things like how to evolve (in other words those who still needs tutorial mode). I do belive these people know that they don't know what they are doing. Nothing helps against stubborn people, but I do belive they are in minority.
2. Personally, I wouldn't want a little red warning telling me what I should and should not do.
I'm not talking about a bright red color that makes your eyes hurt. Just something a little bit more red than that white/grey color that the tutorial mode uses normally. And people do turn of tutorial mode when they know what they are doing and won't then have to look at the warning anymore.
3. The crap builders that do what they're told aren't the problem. It's the ones who build silently and ignore people who tell them to stop who are the problem. Those people won't be held back just because a message in red font said it's a bad atidea.
I belive the problem is that many noobs won't read the chat because they are busy playing and don't belive anyone is talking to them. The text in tutorial mode is on the screen all time and they will read that eventually. It's also a question of authority. If the hint is in the tutorial its a part of the game and something the developers put there (or at least aproved of). That's worth more than some tip from another player you don't know.
