Most hackers will just troll the lobby. They spoof a name, astat the game, boot all the players, then leave. Rinse and repeat.
It's rare that a hacker will get into a game, then /win hack in the first 3 seconds.
Most people that know that a hacker is trolling them will /stat and /whois every player in the game, or if they have the hacker's real name, just /whois him repeatedly.
Overall, most hacking to rape the entire game happens a) in the lobby, and b) when they are losing in game (mid/late game). They will rarely hack within the first 3 minutes of a game, let alone first 3 seconds. Also, if you detect the player hacking, why bother making another condition to detect enter. If they are caught, just drop em.
None.