Opt-In vs Opt-Out for Post Types

[shawnhooper]

I love love love being able to push notifications to Slack when new posts are published. I believe this feature has led to more team members in our company reading our own blogs. Win!

Problem: When we add a new plugin to any of our sites that uses a custom post type, if we forget to go and modify Rock the Slackbot's configs, those posts start getting pushed to Slack. Accidentally did that today with a modal dialog plugin.

It would be great if I could specify, either in the UI or through a filter, a list of post types that get pushed to Slack, rather than setting which ones get excluded.