Every time there's a griefer or hacker, I'll encourage people to votekick them but it never passes no matter how much damage they're doing. When you call for a votekick there should be a message that shows up in the chat log like "1 person has voted to kick Deuce. To vote to kick player type /votekick #"

It would be nice to know how many votes it takes to kick somebody as well

Agreed.

the votekick messages are displayed for the server operator, I've banned many a player this way. Would be nice to have timestamps in the server log as it makes going through the logs to find the offenders IP much easier.