Re Phil Windrum's point: unless I am much mistaken, none of the crashes he mentions have killed anyone other than the rider? Risks to "outsiders" are surely reduced when it is something much less than a 200kg Superbike involved - less speed, less weight = less distance travelled and therefore less consequential damage. If you could choose to be hit by a Vespa scooter or a 40-ton juggernaut, which would you pick?
The Isle of Man has been woefully negligent for years IMHO in not providing purpose-built marshall posts, carefully positioned to afford the optimum view (using CCTV if necessary) with state-of-the-art communication facilities built in. There could be a telephone point on the outside, like the old police boxes had, where the public could quickly contact a central control point (wherever the present 999 calls are routed to?) in the event of emergency situations all year round, thus showing that the races can actually contribute to Island life.
It seems to come as a total surprise that each year some people turn up to race round, on motorcycles, cycles, rally cars........this is not the 1920s!
As for his other comment - speed has never killed anyone, it is only when the speed is stopped by a stationary object that damage results!