Members: Lock Role

The Members: Lock Role filter should be used as an additional security measure to ensure that the member cannot DOM hack their own Role. This filter ensures a newly registered member will always be of the Default Role or if updating a Member record, the filter ensures the Role doesn't change from the Member's current role. If you do not use the Member: Role field, you don't need this filter on your Registration event. If you want to elevate a Member between Roles, this can be done in the backend, or don't use this filter. Care will need to be taken that a Member is not able to change their Role to whatever they please.