Here's an idea. How about some pirates/unlawfuls stick to LFs too? I know that in the VF, at least, we have begun to use Lokis (The Hessian Light Fighter), more than the Odins or Sabres (VHFs). That means that whenever we encounter the military, we're outgunned. If we happen to run into RFP though, a pleasure that I don't believe I've had, we should be on fairly equal footing.
The problem is inflation. If all the bad guys have VHFs and Gunboats, the good guys need VHFs and gunboats, kinda like an arms race. If the bad guys begin to use LFs more often, the good guys will probably use LFs more often.
On another note, I think that we should get HF Mk IIs or do something to give the vanilla heavy fighters a boost. As it is, they are more than useless. The LF MkII has more hull and firepower than the heavy fighter! I want to fly the Stiletto, but currently, the Scimitar has more hull, more firepower, bigger power plant, more maneuverability... there's absolutely no reason to ever fly an HF outside of traveling to get your LF MkII, VHF, Bomber, or Cap.