Make sure you're sending it in a mail and not a direct message chat.
Just copy he text again "Send gigibinks a message and include the word nauseating in there. It's a little inside joke that I know he'll get, but he ain't gonna be laughing. Oh and make it a believable message in case the cops are reading it. Do it right and he'll know what I mean." And send that entire message to the person. That should work with no issues. If it doesn't, file a report in the bugs and issues forum.