At the moment, when viewing a Custom Form or Event Registration, it is not clear that when you click a checkbox and then select the Update button that this is going to mark the response as "Handled".  Elsewhere in the system, when you select one or more options and click a button within the Podium interface you get some additional screen in order to confirm what you're about to do.  This does not happen here.

Additionally, anything marked as "Handled", whether intentional or unintentional, cannot be undone.  This is more problematic than anything else.

Obviously, would like to see this interface get the SKY treatment, but in the meantime would like it to be clearer what the Update button does, give users an opportunity to cancel and not immediately mark selected submissions as "handled", and allow things marked as "handled" to be returned to "unhandled" if necessary.