1: Theoretically speaking it is possible (like killstreaks and the dummy holding the ipad) but requires a significant number of assets that likely would crash the game after a time. Besides there is enough ghosting and no need to make it worse.
2: No. You dont prevent someone from playing the way they want here so long as rules are not being broken (glitches and such). I hate bunnies but wont prevent players from doing it. I DO however give extra points to those that pick them off when they are in the air.
3: Then you wouldnt be frozen. Strictly speaking you shouldnt be able to rotate either but doing so doesnt affect other players. Other they spying on them.
4: Mod already has something like that for bullet damage. Damage to your leg causes you to slow down, you cant run, and you cant jump. Not enabled here.
5: They are sniper rifles. Treat them as such.
6: 'pulling out' (double entendre?) is a game engine thing and cannot be changed.
7: For more weapons, no point. Why do so if they offer no advantages and disadvantages compared to the others. Game asset limits, not worth it.
8: See above about you fucking bunnies.
9: Dunno if its enabled, probably not, but mod also has the bounty option that points out excessive campers as objectives. Go get em for bonus points.