Kat Hagan

This plugin allows you to selectively disable comments for visitors from certain sites (e.g. reddit). If a visitor’s HTTP referer matches one of the hosts you’ve blacklisted, your post will look as if comments have been disabled (neither existing comments nor the new comment form will be shown).

Disable Comments By Referer

Ban visitors from certain sites from viewing or adding comments.

Ali.Dbg

Anonymous 
hide referer 
rel = nofollow 
target = _blank 
all external links 
with Automattic’s href.li

Anon Links

First Release

Anonymiz, Anonymizer, Anonymous, hide referer, nofollow, target blank all external links.

Disable Comments By Referer vs Anon Links