Typically I delete all ping backs that are listed as comments on my sites. Recently though I've been noticing that blog posts that I've made on other peoples blogs have been generating ping backs to my site. My question is should I approve those? If the ping back is coming from my article on someone else's site... is that good?
I have done some as you, all of my backlink in comment, although is it rel=nofollow, but good if we delete all link in our comment come from our site visitor
If the site is good, approve it. If its a spammy site, the don't. You could also put nofollow as cx3 said.