This feature is not available OOTB on the SugarCRM, but it is a clever request.
I can imagine this feature being implemented via a scheduled job very close to scheduled report, but instead of sending the report the the target users it would sync a specified Target List.
This is not a big deal to implement. Let us know if you would like to have it implemented.
We at enable.services have created an addon that does this called enable targets lists. You are able to choose under a sub panel in the target list which reports you wish to sync and also the type of report "unsubscribe or subscribe". You also have the option to enable dynamic reports to change the target list from static list to dynamic list to keep them in sync. should you wish for more information, please get in touch jbushnell@enable.services
