Idiom describing behaviour that is unacceptable…

Idiom describing behaviour that is unacceptable, outside the limits of decency or accepted standards. The key word originally meant a pointed wooden stake, and by extension a fenced area under a particular authority. From the late Middle Ages, the English Crown controlled a district around Dublin known by that name, and the land outside it seemed lawless and hostile. Similar enclosed zones existed around Calais and in the Russian Empire.

The answer in 13 letters