I mean, seriously, do you think those types of players are good for the game?
That's not the right question, though. The question should be "do you think that the steps needed to deal in-game with those players would be good for the game?" to which the answer is - based on the suggestions so far - a clear "no".
For example, we could deal with those players by making Solo the only mode. If they can't instance with their targets, problem solved. Most players would probably prefer that Frontier not solve the problem that way. Frontier certainly won't.
The thing is, destroying a Sidewinder flown by an inexperienced pilot doesn't actually require an engineered meta ship. An unengineered frags Viper III is massive overkill already and costs just a few million credits. You could up the punishments to "if you kill another player a Coriolis drops out of supercruise next to you, opens fire, and your account gets reset rather than rebuy" and it still wouldn't save the Sidewinders - it'd just mean people used alt accounts to kill them ... and meanwhile the old "station ramming" trick would get a new lease of life due to the ease of getting moderately inexperienced people to murder you.
Credits earning is really easy, so credit-based consequences aren't. Frontier could haul back credit earning - take two zeroes off the prices of the new mining goods, and one zero off everything else - would that be popular, do you think?
Engineering is pretty easy nowadays, too. I can engineer up a new ship in fifteen minutes of clicking. I can engineer it up to the point where it could take on an unengineered trade ship a lot quicker (a bunch of cheap G3 mods is already overkill and costs virtually nothing in terms of materials). Should engineering be made much harder so that losing an engineered ship is more of a consequence? 2.1 had that and was really popular, right?
Actually killing an unlawful player is really tricky. Very easy for them to tank up their shields and high-wake long before they're in danger. Should we make it much harder to high-wake out of a fight, and make shields much weaker? There's an obvious consequence there, and it's not the hostile players who will be complaining the most about it...