17. The method of claim 15 wherein sending a message to the chat room to stimulate messaging among the participants of the chat room includes: composing the stimulating message based on a response from the second messaging identity to a question previously sent from the messaging robot to the second messaging identity.
15. The method of claim 12 wherein the instructions cause the one or more processing devices to perform the following operations: detecting, based on the monitoring, a pause of a predetermined length in messaging among all participants in the chat room; and in response to detecting the pause of predetermined length, sending a stimulating message from the third messaging identity to the chat room to stimulate messaging among the participants of the chat room.