Custom Magento admin notifications

config.xml

<?xml version="1.0" encoding="UTF-8"?>
<config>
    ...
    <adminhtml>
        ...
        <events>
            <controller_action_predispatch>
                <observers>
                    <meanbee_notification>
                        <type>singleton</type>
                        <class>notify/feed</class>
                        <method>observe</method>
                    </meanbee_notification>
                </observers>
            </controller_action_predispatch>
        </events>
        ...
    </adminhtml>
    ...
</config>

Would it not be better to listen to a more specific event e.g. controller_action_predispatch_admin_dashboard_index? Listening to every action is going to fire off a lot of calls to your feed.