How to exclude RSS forums from today's posts?

[smsmasters]

I have set one forum for all the RSS Feeds but all the posts show up in today's posts, new posts, etc... How do I exclude them?

[smsmasters]

Never mind, I did this:

Create a new plugin with a hook location of "search_start" with the following command...
Code:
$_REQUEST['exclude'] .= '17';

[shanemcse]

Never mind, I did this:

Create a new plugin with a hook location of "search_start" with the following command...
Code:
$_REQUEST['exclude'] .= '17';

Does this work with 3.6.1?
Does the Execution Order matter? It is currently set to 5.