Disable the Admin Bar that now appears on the public side of WordPress blogs.
For a hassle free integration, drop the plugin file into <code>wp-content/mu-plugins</code> (create the directory if needed) and it will be automatically activated.

Disable Admin Bar

A new trend in spam is to duplicate legit comments from your readers to hopefully pass spam filters. Spammers post content that was previously approved on your site, but with their own name and URL. This plugin prevents this.

Ozh' No Duplicate Comments

Prevents spammers from duplicating legit comments but with their commenter name and URL

Disable Admin Bar vs Ozh' No Duplicate Comments