I'm not one to tell people not to have fun, but i also lost a friend to respiratory failure after prolonged nitrous abuse, and had more then one start having auditory hallucinations. I think it's waning in popularity compared to 10 years ago, but maybe I'm just out of touch with what the kids get high on these days

In zero tolerance Sweden, nitrous is oddly perfectly legal. In fact, I recently got a cheerful flyer from our municipal waste disposal company announcing that empty 1L nitrous bottles can now be left with common household hazardous waste.