Suicide attacks in FT

I think the only way to prevent wargamers from conducting all out
attacks 
to win scenarios are campeigns.  If you know that you have to maintain a
 fleet in force to prevent an opponent from sacking your home world, you
 are not going to risk near destruction of your fleet to completely
destoy
 your opponent's.  The other option in a scenario is to create gradience
 of victories such as draw, minor victory, major victory etc.  Ensure
these
 conditions support the surrounding story of the scenario.
Phil P.