I've always been wary of taking drugs. They're illegal and I don't want to get into trouble, but 'legal highs' don't have that problem.
It seems they're not risk-free, though. In 2012, 64 people in the UK died after taking a legal high, a big rise on previous years.
Even though they haven't been banned, 'legal highs' have to be sold in boxes stating they are 'not for human consumption'. Maybe we should heed that advice.