Usage: `/BAN [channel] userhost[,userhost...]'
This command will ban everyone with the specified userhost(s) from entering the channel. With the optional channel argument you can setup a ban on a different channel than the one in which window the command is executed.
Related: BANDEL-BANLIST- KICK-KICKBAN- QKICK-QKICKBAN
Examples:
`/BAN bill@*.microsoft.com'
Will prevent a user called BILL in the MICROSOFT.COM domain from
entering the channel.
`/BAN Amiga bill@*.microsoft.com'
Will ban user BILL on MICROSOFT.COM from entering #AMIGA.