In your wordpress website source, you can notice that there is a meta tag called "generator" which tells which wordpress version you are using. This causes a serious issue to wordpress sites as they give more information about the Wordpress used.

Email address are frequently used in each and every posts at the bottom or at the top for contacting the post’s author. But those email addresses get spammed more. Replacements like using images instead of directly typing the addresses are also appreciable. But they can be painful inserting the images directly in each and every [...]