""Surely the most important thing in validating a lifestyle, is whether or not it is safe and healthy?""

So we should ban scuba diving, potholing, mountain climbing, free fall parachuting, parasailing, waterskiing, motorcycle racing, motor racing and especially space flight which has killed 21 astronauts and some 200 civilians in rocket launch accidents, in the process of sending a total of 560 persons into space.

There are plenty of genuine "lifestyle" choices which are decidedly unhealthy, but nobody suggests putting restrictions on them.

And before you make the usual comment about them not infecting others, tell it to the 89 others who died in 1955 when Pierre Levegh crashed his Mercedes, of the 200 non astronauts killed by space flights.

Don T