In the UK, it not only can be, it is. If you look, you'll find a case of it, eventually, because the UK brings in almost 200 people a month over internet charges that are considered mildly offensive but legal and benign in the rest of Europe.
Two of the most serious cases I can think of this, is hate speech arrests of teenagers for sharing rap lyrics with 'nigga' in them, and the slew of "harmful speech" arrests over criticizing the crown around the queen's funeral.
Two of the most serious cases I can think of this, is hate speech arrests of teenagers for sharing rap lyrics with 'nigga' in them, and the slew of "harmful speech" arrests over criticizing the crown around the queen's funeral.