To raise this with school? Song lyrics

[NotEnglish]

Today parents were invited to the school to see the kids perform.
They perfomed a really cute dance BUT the lyrics of the song chorus were
"We drink a schnapps, and then we drink another. And then we drink Tequila to enhance our mood"
(I paraphrase, the song was in german)

The kids are 6-10 years old.

AIBU to think that is not appropriate?

Can we just ban all songs, art, culture and be done with so this never happens again?
Enlist some kind of 'purity police' department in the civil service to get started?

I can remember singing Sweat around the playground in primary school. None of us knew, probably just thought it was about dancing in a Caribbean heat...