RLV has a bad reputation for being used a lot in slave/bdsm roleplay. But it is safe to use it for other cases. I use it in some of my products. sometime mandatory, sometime optionally.

• To lock an attachment and avoid it to be detached when you load an outfit that does not contain it
• To wear or detach items
• To activate a group tag

Good to know

• Enabling RLV on your viewer does not expose you to actions from others until you wear some RLV device
• Only objects you are wearing can send RLV commands
• RLV can not access your L$ account.
• When RLV is active you can always check what attachment is doing what in your RLVa menu under Restrictions

RLV API documentation