Suggested for a different benefit and with different rules here a long time ago: https://freestylersworld.com/showthr...yer+visibility
Perhaps with this added reasoning, it may be implemented. However, while it could be possible to implement this without too much hassle by manipulating the NAT behavior for visibility of players, it may be a big challenge to code and thus still not worth doing just for players slashing/shooting in training rooms.
