Cleaning up WP head: good idea?

Hi:
I’ve read several articles that advise adding this to the functions.php:

<?php
remove_action( 'wp_head', 'feed_links_extra', 3 ); // Display the links to the extra feeds such as category feeds
remove_action( 'wp_head', 'feed_links', 2 ); // Display the links to the general feeds: Post and Comment Feed
remove_action( 'wp_head', 'rsd_link' ); // Display the link to the Really Simple Discovery service endpoint, EditURI link
remove_action( 'wp_head', 'wlwmanifest_link' ); // Display the link to the Windows Live Writer manifest file.
remove_action( 'wp_head', 'index_rel_link' ); // index link
remove_action( 'wp_head', 'parent_post_rel_link', 10, 0 ); // prev link
remove_action( 'wp_head', 'start_post_rel_link', 10, 0 ); // start link
remove_action( 'wp_head', 'adjacent_posts_rel_link', 10, 0 ); // Display relational links for the posts adjacent to the current post.
remove_action( 'wp_head', 'wp_generator' ); // Display the XHTML generator that is generated on the wp_head hook, WP version
?>

Generally the articles say these things are unnecessary code. I’ve been removing the wp_generator for security for a long time, but I’ve been leary of doing the above because I’m entirely clear why the code gets generated in the first place and whether I’ll harm anything if I remove these. I code custom themes for clients, and about 60% don’t have blogs at all, while the rest have blogs but not as the homepage. I use blogs for News Items more than anything. I’m always happy to get rid of unnecessary code but don’t want to end up inadvertently screwing something up.

I’d really like some advice on this –

Thanks!