performance/scalability problem when a user enters chats quickly

There is a potential problem with this module if a user enters multiple chat messages quickly.

This could potentially be mitigated with a mix of client side (i.e. javascript) and server side php checks before the message is sent (i.e. flood_is_allowed).

This issue was originally identified by ball.in.th and reported to the security team as a denial of service, but it was deemed to be no more serious than other ways that an authenticated user can create resource demands on a site.