Making the penalty really high isn't as much of a deterrent as you might think. One difference between ramping and bank robbing is that banks make it difficult to actually rob one nowadays. Bank robbing is a high risk/low reward crime.
Ramping markers, on the other hand, are easy to acquire, easy to get away with and easy to lie about. A lot of players with blatant cheater guns insist they're completely legal.
The NPPL tried this last year (full team suspension), but the number of cheating markers didn't really decrease much. Players see the risk/reward of a ramping marker as acceptable. And deniable, if they get caught
If you're going to depend on the marshalls to make these calls:
- make sure they know markers inside and out
- Make sure you have enough of them to cover the field AND watch markers at the same time
- make sure they know the difference between bounce and ramping software
- make sure you're prepared for the arguments that will occur when a suspended player/team screams bloody murder about the referees decision and how the referees are out to get them/stupid/incompetent/lying and the player is innocent/made a little mistake/just got the gun and didn't realize/blahblahblah.
- make sure you're prepared to back up the referees decisions in the face of the players arguements, because the first time you overturn a ban you can probably forget about them checking more guns.
I'm not trying to be negative, just pointing out that it's not as simple as you may think. Being able to tell the difference between bounce and ramp at high rates of fire is tough, as is knowing how the cheats work (if you don't know the difference between pulling a trigger and slapping a trigger, you're not going to catch many rampers)