I created a chatroom on Slack for that purpose, we have private channels for mods of different various streams. If you choose to go that route, just ask me to create you a private chatroom and I'll set you up.
https://join.slack.com/t/chatroomimgflip/shared_invite/zt-d9ez5kgk-s_bHt0rzrlfEuRk5JUMY2Q
Otherwise there's the unsubmitted meme trick Kylie mentioned, but it's not foolproof.