BuddyPress.org

Will this get you close? https://buddydev.com/introducing-buddypress-simple-google-map-plugin/

This plugin can help with your wish: https://wordpress.org/plugins/buddypress-group-email-subscription/

It sounds like Member Types could solve your problem: https://codex.buddypress.org/developer/member-types/

You can find their activity items via the db. Find their items by SELECT * FROMwp_bp_activityWHEREuser_id= 'USER_ID_YOU_WANT_TO_FIND'

Comments and posts should be delete-able via the WP Admin interface for those items.

If you have database access, take a look in wp_bp_activity. This query will find activity item comments:
SELECT * FROMwp_bp_activityWHEREtype= 'activity_comment'