I agree that "please" is not helpful. Only say "please" if you genuinely mean "well, this is my preference, but the alternative is fine too". It's impossible to take something impolite and make it polite by adding "please" - and you may obtain the opposite result. No matter what a dictionary says.
There's actually differences between Australia and England in the utility of "please". In England, fines get paid faster and more reliably if you say "Please pay now". In Australia, they get paid faster and more reliably if you say "Pay now". If I got a fine that said "please pay now" I'd genuinely think I was freely allowed to not pay now if I didn't want to.
And when I was over there, it was really jarring/humorous where there were all these official signs saying "please do this, please don't do that", especially the ones that said "please don't do that, penalty 50 pounds".
So obviously this is regional. I don't really expect anyone to know who they're code reviewing for, but everyone should be aware that there's nothing universal in the interpretation of "please".