Tom,
If they start them in 10 second waves, there shouldnt be a problem,
As you know yourself, that in a 9/10 lap race around there, there is a damm good chance of getting lapped,
Even with a massed start, you can catch people up very early on,
To me that would mean that they need to bring in the Blue flag, at least then the slower guys have got a idea that the quick guys are coming upon them,
This should have been done ages ago, not only for the S100 course, but for the Mountain circuit, From certain laps depending on the race length,

TM
The guys that will be racing there wont be," fighting for a TT win "
They will be enjoying what comes naturally to them,

"Surely the entry requirement will ensure that all riders are of a given standard to minimise the risk of lapped riders. If not, I'm sure you'd be lapped in any case no matter where you started? "

On this point As you dont need the bit of paper from the ACU, you are going to see some people that might suprise you,
Guys that love racing 2 strokes, but have had to sit on the sidelines for the last couple of years because there has been no road circuit apart from Ireland to play on,

And as for the being lapped bit ,that has already been covered

All the best
Mike