Thanks for pointing that out. I will also add a message to remaining friends on the next message if they want me to continue the messages or not. That way, I could stop sending to those who don't want anymore.
Would word it out like this...
NOTE: If you still want to receive cosplay messages please send me a visitor message or pm. If I receive a "no" or simply receive no reply, then I would stop sending cosplay notifications to those accounts.
Can you stop spamming on Louise's VM? She no longer logs on here, which you would have known had you just looked at her last activity date. Hooves doesn't find them interesting either so just stop spamming their VMs.