No it wouldn't because as Meowcenary said they would just reconnect. Think of the voteban as a 30 minute kick.It'd be nice to have it.
Seems kind of pointless. Kick the player, they reconnect instantly.
All you did was cost them 2 clicks and 15 seconds of their life
When we had vote kick with lower requirements, people complained that abusers were using it to grief. Since kicking is not logged to a single place, and people don't report kick abuse as much as ban abuse, it was the logical decision to remove it.