Block/reject OW relationship?

First off, this is a great module. Really well though out.

My question: is there any way to block a one way relationship? We're using the friendlist module's one-way relationship for a subscription-type setup, where users can subscribe to other people's blogs in order to be notified of their posts. In the case that someone random subscribes to a user's blog, is there any way for that person to force that user to unsubscribe without allowing them to subscribe again?

The only way I can figure this to work is to make it a two-way relationship and take advantage of the "disregarded" flag. This also forces the two "_P" statuses to be active, but since I'm only using the API, I don't think it really matters.

Thoughts?