If it's an admin speaking, I don't see why not.
By "wouldn't have checks for links" he means an admin won't be able to use links in the chat with this mod.
There's no good way to do this since all the chat functionality is mashed into one big server command clusterforget. If you want an okay way, just copy/paste Slayer's chat function and make your modifications to that. May have to cut out some Slayer specific stuff if you're not running Slayer, but I find the function less ugly than the default messageSent.