If you would like to control who is allowed to PM you or prevent bothersome individuals from bothering you follow the following steps. Once you have been chatting a while you have probably received a few unwanted messages. The following steps are very simple and take a few seconds. But remember you will have to repeat these steps at every login.
These are the following commands to give you the ability to make a list of those who you would like to be able to PM you and blocks the rest.
To enable type /mode Nickname +G
To add someone to your list: /accept +nick (also when you PM someone it auto adds that person to your list)
To remove someone from your list: /accept –nick
To show who is on your list: /accept *
Again remember you will have to relog the information at each new log it. it’s also easy to keep your block list in a note so you can copy paste at relog.
Be safe and Happy Chatting!