Ratpak,
It's entirely up to you if you want to be in vent while playing. Most people enjoy it as it helps coordinate play with friends. It is an open vent, so if you have a player who is not a member of eGO please, invite them to join you. All I ask you to consider if you do this is why they're not a member of eGO, and to perhaps use vent to bring them into the family.
We do however suggest that if you're an eG or an eGO you are in vent while adminning and moderating servers. This allows coordination with other admins, and results in smoother adminning.