Disable Activity Stream on Sugar 7 - Application logic hook to disable writes everywhere and example of vardefs to disable module specific UI

afterEntryPoint.php

<?php

// Enrico Simonetti
// enricosimonetti.com

// custom/logichooks/application/afterEntryPoint.php

class afterEntryPoint
{
    public function disableActivityStream($event, $arguments)
    {
        // disable activity stream
        Activity::disable();
    }
}

example_contacts_vardefs.php

<?php

// Enrico Simonetti
// enricosimonetti.com

// custom/Extension/modules/Contacts/Ext/Vardefs/acitivity_stream.php

$dictionary['Contact']['activity_enabled'] = false;

installer.afterEntryPoint.php

<?php

// Enrico Simonetti
// enricosimonetti.com

// custom/Extension/application/Ext/LogicHooks/installer.afterEntryPoint.php

$hook_version = 1;
$hook_array['after_entry_point'][] = array(
    1,
    'Disable activity stream on after entry point hook',
    'custom/logichooks/application/afterEntryPoint.php',
    'afterEntryPoint',
    'disableActivityStream',
);