backwoodsman
Tour Winner
Telling a player he is about to tee off from the wrong teeing ground is most certainly not advice. Information on the rules is NOT advice.
It's not so much a matter of the rules, it is simply a matter of fact. "S'cuse me guv', we're not playing off that tee" is a statement of fact and therefore not advice.
Answers to OP - No and yes.
I recall once watching a player tee off the wrong tee (yellow instead of white), and then, with a shout of "young male cows" , warning the next player about it - to his gratitude. However, the annoyance of the other was tempered (slightly) because he'd only copied what I'd done a moment before him...