User Modes

Flag	Title	Description
C	No CTCP	Prevents users from sending CTCPs to you.
D	Deaf	Don't receive channel messages.
g	Caller ID	Only allows users you've /accept'ed to private message you.
G	Soft caller ID	Only allows users you've /accept'ed, or that are in at least one common channel to you to private message you.
i	Invisible	Prevents you from showing up in a wildcard /who command. (Automatically set on connect.)
p	Private	Hides your channels and idle time in a /whois yourNick.
R	RegOnly	Only allows users who've identified to Nickserv to be able to private message you.
r	Registered	Only set by services. You get this when you are identified to NickServ.
S	SSL	Only set by the server. You get this when you connect via SSL.
W	CGI:IRC	Only set by the server. This means you are connected via either Qchat, RizonBNC, or Mibbit.
x	Cloaked	Hides part or all of your hostname. (Automatically set on connect.)

Note: Rizon Staff can always PM/CTCP you, and see full whois information.