Sometimes you want to customize your node forms because end users are entering erroneous data. One situation that happens a lot is a field that you usually don't need any data entered but people do because the field is displayed.
Integrating a CDN to serve your images and static files is a great way to take load off your webserver and improve overall performance of your website. Unfortunately, it can also cause SEO issues such as duplicate content. Your webpages can be cached by the CDN and then possibly get included in Google's search index.
One way to avoid this is to use the .htaccess file to only allow php scripts (supporting dynamic image styles) and static files such as images or text files. The following example is for Drupal 7 websites using clean URLs.
This is a very basic recipe to stop Drupal 7 comment or node spam on your Drupal 7 website. This post assumes that you are not allowing anonymous comments and that you allow registrations to post node or comment content on your website. If you allow anonymous comments, that is an entirely different subject and will be explored separately in the future. This is just one method, there are alternative methods depending on what type of spam your site is getting.
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