Presence generates a lot of overhead, including http requests, inserts/deletes to SAKAI_PRESENCE and event traffic.

As presence in user my workspaces is largely redundant (no other users ever show up there), it would help reduce system load to hide presence in my workspaces. This could be configurable through a sakai.properties setting, e.g. to disable presence for my workspaces only, or more generally to enable presence for a list of site types (e.g. project only, or course & project but not my workspace).

Will contribute code for this.