Disable Magento Logging observers & unused Core Modules via XML

gistfile1.xml

<?xml version="1.0"?>
<config>
    <frontend>
        <events>
            <!-- disble logs -->
            <controller_action_predispatch>
                <observers><log><type>disabled</type></log></observers>
            </controller_action_predispatch>
            <controller_action_postdispatch>
                <observers><log><type>disabled</type></log></observers>
            </controller_action_postdispatch>
            <customer_login>
                <observers><log><type>disabled</type></log></observers>
            </customer_login>
            <customer_logout>
                <observers><log><type>disabled</type></log></observers>
            </customer_logout>
            <sales_quote_save_after>
                <observers><log><type>disabled</type></log></observers>
            </sales_quote_save_after>
            <checkout_quote_destroy>
                <observers><log><type>disabled</type></log></observers>
            </checkout_quote_destroy>
            <!-- disable reports -->
            <catalog_controller_product_view>
                <observers><reports><type>disabled</type></reports></observers>
            </catalog_controller_product_view>
            <catalog_product_compare_add_product>
                <observers><reports><type>disabled</type></reports></observers>
            </catalog_product_compare_add_product>
            <catalog_product_compare_item_collection_clear>
                <observers><reports><type>disabled</type></reports></observers>
            </catalog_product_compare_item_collection_clear>
            <catalog_product_compare_remove_product>
                <observers><reports><type>disabled</type></reports></observers>
            </catalog_product_compare_remove_product>
            <customer_logout>
                <observers><reports><type>disabled</type></reports></observers>
            </customer_logout>
            <sales_quote_item_save_before>
                <observers><reports><type>disabled</type></reports></observers>
            </sales_quote_item_save_before>
            <sendfriend_product>
                <observers><reports><type>disabled</type></reports></observers>
            </sendfriend_product>
            <wishlist_add_product>
                <observers><reports><type>disabled</type></reports></observers>
            </wishlist_add_product>
            <wishlist_share>
                <observers><reports><type>disabled</type></reports></observers>
            </wishlist_share>
        </events>
    </frontend>
    <!-- Disable unused modules -->
    <modules>
        <Find_Feed>
            <active>false</active>
        </Find_Feed>
        <Phoenix_Moneybookers>
            <active>false</active>
        </Phoenix_Moneybookers>
        <Mage_XmlConnect>
                 <active>false</active>
        </Mage_XmlConnect>
        <Mage_GoogleCheckout>
            <active>false</active>
        </Mage_GoogleCheckout>
        <Mage_Usa>
            <active>false</active>
        </Mage_Usa>
        <Mage_Authorizenet>
            <active>false</active>
        </Mage_Authorizenet>
        <Mage_Backup>
            <active>false</active>
        </Mage_Backup>
        <Mage_Centinel>
            <active>false</active>
        </Mage_Centinel>
        <Mage_Compiler>
            <active>false</active>
        </Mage_Compiler>
        <Mage_Giftmessage>
            <active>false</active>
        </Mage_Giftmessage>
        <Mage_PaypalUk>
            <active>false</active>
        </Mage_PaypalUk>
        <Mage_Persistant>
            <active>false</active>
        </Mage_Persistant>
        <Mage_Weee>
            <active>false</active>
            </Mage_Weee>
        <Mage_Productalert>
            <active>false</active>
        </Mage_Productalert>
        <Mage_Tag>
            <active>false</active>
        </Mage_Tag>
    </modules>
</config>