It would be best if you can submit a feature request regarding this in our voice page -> http://stackideas.com/voices/easysocial , so everyone else could vote for it, the more people request on this, and we will priority consider it.

By the way, thanks for your suggestion.

I have just run into this issue as well and could not find a way to dismiss or cancel a broadcast notification.
I could not find any entry on the Voices board so I created the following: http://stackideas.com/voices/easysocial/item/998
If you're here for this feature, please go vote!

Arlex/Stackideas team,
Is there a non-graceful way either via the backend joomla or even the database to dismiss or cancel a broadcast popup or notification for all users? Or is this broadcast sent and stored with each user, requiring admin to edit one user at a time?

Hey there,

Currently the only way is for you to empty the records in #__social_broadcasts if you want to remove items.

By the way, please remember to assign your domain to your license to obtain for support in the future. You can do so by accessing your license area at http://stackideas.com/dashboard