Be/get: interesting, I thought there to be a major difference (one describing a state already in, the other the process leading there).
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I think it’s an alternative warning about a different danger
What bugs me for this interpretation, is that the warning about drunk driving would then be completely missing. That doesn't make sense somehow.
What surprisingly is even less safe: Using stairs.
Statistics show e.g. using stairs to be about 3 times more deadly than traffic participation as a pedestrian in my country.
So it would actually make much more sense to print "Don't drink and use stairs" on the bottle. :-)