Þessi falska etymológía gengur ekki lengur!

disco discere didici:
[to learn , get to know]; ‘discere fidibus’, [to learn to play on the lyre]; in gen., [to receive information, find out; to become acquainted with, learn to recognize].
Latin dictionary and grammar aid.

Versus:

disco:
1964, Amer.Eng. shortening of discotheque; sense extended 1975 to the kind of music played there.

discotheque:
borrowed 1954 from Fr. discothèque „nightclub with recorded music for dancing,“ also „record library,“ borrowed 1932 from It. discoteca „record collection, record library,“ coined 1927 from disco „phonograph record“ + -teca „collection,“ probably on model of biblioteca „library.“
Online etymology dictionary.

Niðurstaða: Þegar barnið þitt fer á diskótek, þá er það ekki að fara að læra heima. Það er að fara að drekka landa.