Currently new characters automatically ignore encrypted keys by default. This hurts RP and new immies might not know to turn on SIC encryption. Also, since the @options encrypted command is OOC, it's impossible to tell someone how to change this setting without using local OOC and thus being in the same room as them.
I suggest that encrypted keys should be shown by default. It offers so much data and RP opportunity that it's just a huge negative overall for immies if they don't know to enable it. Also, if people see that others are active on SIC encrypted keys, they'll know that the MOO is not dead even when pubSIC has been quiet.