whether to require stealth mode in competitions is being actively debated.

This is how Flarm works:
1. If you see another Flarm then the other Flarm sees you.
2. If you are in stealth mode then others don't see you but you also
don't see others (but you do still get the alarm when there is
immediate danger of collision)

Given the above it is actually pilot's decision whether he will choose
stealth mode or not. If he doesn't he has the opportunity to see what
others are doing. If he does enable stealth mode then he doesn't see
the other gliders around him.

I would say that 90% of the pilots in competition leaves Flarm in
normal mode. I certainly do. Either way it's not a problem and both is
completely fair for all pilots involved.

Andrej Kolar
--
glider pilots use
http://www.naviter.com