There are a lot of guest posts on my blog. Some of them have links pointing to some lame blog. I want to remove some of those links. I know it's unethical but after the recent PR update I've decided to not pass too much link juice to other sites. Do guest bloggers keep track of the guest posts they submit to other blogs time to time? I don't want them contacting me later about this or take revenge by attacking my site or whatever. I know it's immature of me to do this, so don't say it. Thanks!