Avoid direct-linking to images

[eluser]veledrom[/eluser]
I can still hot-link to the images with these modified htaccess files:

Code:

RewriteEngine on
RewriteCond %{HTTP_REFERER} !^$
RewriteCond %{HTTP_REFERER} !^http(s)?:
RewriteRule \.(jpg|jpeg|png|gif)$ http://codeigniter.com/images/design/ci_logo2.gif [NC,R,L]
RewriteCond $1 !^(index\.php|web|robots\.txt)
RewriteRule ^(.*)$ /index.php/$1 [L]

Code:

RewriteEngine on
RewriteCond %{HTTP_REFERER} !^http://(.+\.)?thisismysite\.co.uk/ [NC]
RewriteCond %{HTTP_REFERER} !^$
RewriteRule .*\.(jpe?g|gif|bmp|png)$ http://codeigniter.com/images/design/ci_logo2.gif [L]
RewriteCond $1 !^(index\.php|web|robots\.txt)
RewriteRule ^(.*)$ /index.php/$1 [L]

Please help.

My CI folder structure:

Code:

.htaccess
index.php
license.txt
application
system
web
  - images
    - all the images are here
  - css
  - js
  - index.html