If you're making another mod with Rites for a faction, and you wish to assure these rites aren't loaded while yours are, just do the following:
- create a new entry in campaign_groups, call it whatever you'd like.
- in campaign_group_members, link the OWR campaign group member you're trying to disable to your new campaign_group, and set the "priority" column to anything above 0. The campaign_group_member keys for OWR are just owr_[faction_key]

So if I were to disable the rites for Kemmler, I would create a dummy campaign_group called "whatever", and in campaign_group_members, I'd link owr_wh2_dlc11_vmp_the_barrow_legion to "whatever", with priority 10. Next time I load in with my mod, the Kemmler rites would be gone!