Factoid: "snuck" and "drug" have in common that the irregular conjugation is the non-standard one, but are different in that "snuck" is a neologism of the 19th century whereas "drug" is in fact the older standard form, gradually supplanted by "dragged."

Today's popular usage often is tomorrow's proper usage.

Even if it is sometimes a bit unfortunate.

I'd consider Vonnegut a more legitimate measure of proper usage of English than a dictionary or grammar textbook.