Adds a umode
+c so you can prevent fucktards who don't share a channel with you from messaging you privately. Simply load it and do
/mode <your_nick> +c. ;3 Opers and U-Lines are exempt from this (i.e. they can always send private messages), the reason why should be obvious imo tbh fam. Additionally, since U-Lines such as
NickServ are usually not present in any channels, they can always receive messages too (rip
/ns identify otherwise ;]).