One problem with enabling your robot early is you don't know when the game is going to start. If you have a reliable way of predict that, then you are slumming & probably should be doing something other than FRC.
Everything is over managed switches so should be difficult to directly interfere with another robot. Although certain combinations of robots play havoc with the FMS system. Keep in mind network traffic is monitored. Consequences for being found out is likely to be severe for the team & individual.