In Australia, raw milk has been sold as "bath milk" (milk that's used for a milk bath), and labelled as not fit for human consumption. However, some people have deliberately consumed such milk, and the producer of the milk has posted on Facebook about how raw milk is better than pasteurised milk.
The only term I can think of for this state of affairs is "off-label", which is discussed in this question, and the consensus is that it's not exactly standard English. Wiktionary doesn't have any synonyms for the term.
Are there any good terms for describing something being used other than as stated? A term about something being used in a way explicitly denied would be ideal, if it exists.