Here is some advice about how to behave in the blogosphere

PROPER BLOG ETIQUETTE:

In a nutshell, I would say you should remember about copyright laws. Plagiarism isn't allowed in school or anywhere else. Practice linking to the original source if you're using some content from another site.
Do not copy or recycle whole posts from other bloggers. Pictures, images and such are also copyrighted material and if you use these elements you should cite the source and provide a link to the original. You may want to watermark your own photos to prevent this from happening to your images and work.

Comments: if someone comments on your blog post, it is good form to respond by either visiting their blog and commenting on one of their blog posts, or acknowledging or replying in the same comments section of that post.