I was having my students register on a site today. They were to register, send me a conversation so that I could assign them to the "student" user group. After the first 10 or so students registered, several found out that they could send "conversations" to each other. Two students in particular kept sending messages. As this happened - loading pages became a crawl. Other students were paused to send messages. The site started tossing random errors when kids would try to load a page. As soon as the two kids stopped sending their conversations then the site went back to loading fine. This particular site I'm describing, btw, is generally very fast. What tweaks should be done to allow multiple conversations to happen without slowing down the site?