I admit I haven't looked too extensively so I may have missed something like this already out there (and I'm new to the server side of Minecraft, so maybe this is a default feature I've overlooked), but I'm looking for a plugin that will make moderator's jobs a little easier: For example, I get a lot of people on my server asking for OP or promotions or creative mode (The rules all say don't do it, but clearly no one reads). I don't like kicking/jailing/banning people on the first offense, I usually like to allow 2 chances before punishment, but it can be difficult to keep track of whether someone has already gotten their first strike and what it was for. So put simply, I guess what I want is a record keeping plugin, maybe with an auto warn/jail/kick/ban feature included. Something that might recognize keywords or phrases like 'can i have op'. I know nothing about creating plugins, but I get the feeling this is a complicated plugin to create, if not impossible. I think it might be similar in design to some of the anti-spam plugins I've seen.
Maybe something like this could do the job: http://dev.bukkit.org/server-mods/chatcensor/ Block the request from showing in chat all together =)