We hit this situation a while back on our product and implemented batching as a result (http://blog.meldium.com/home/2013/4/22/dont-spam-your-users-batch-notifi

We hit this situation a while back on our product and implemented batching as a result (http://blog.meldium.com/home/2013/4/22/dont-spam-your-users-batch-notifications-in-rails http://blog.meldium.com/home/2013/4/22/dont-spam-your-users-...)