Hillary Clinton

... even though you've made the first gesture or reconciliation, you're still relying on a request from the other person, and they may view it as having to "ask permission" or "beg forgiveness". Some may feel that they did nothing wrong, that they were blocked unfairly, and may refuse to respond.

Therefore I wonder... would it be more productive to do something a-la-Skinner, and simply give a blanket amnesty by clearing out the blocked user list?

Perhaps there will be some who'd abuse the amnesty gesture, but they could easily be re-added to the blocked user list. In the meantime, you've shown goodwill and a willingness to forgive and move-on ... and it allows people to "wander-in" at their leisure and participate as their level of comfort grows (or depending on if/when their wounds have healed enough).

Anyway, it's just a thought.