I read the comment column on the blog posts.
Generally I don't zap comments that offer up differing opinions from my own UNLESS the writer is making statements that simply aren't correct, and would lead a reader down the wrong path. An example of that kind of statement would be "when publishers buy first publication rights, you can't sell them to anyone else."
That statement is wrong because publishers don't buy anything, they license rights (but that's a quibble, and not likely to get you zapped) but also wrong because there's no such thing as "first publication rights" in a book contract. Those might exist in a contract from a online site wanting to publish a short story, but it indicates the people writing the contract don't know what they're doing.
I do zap comments that seem to be geared toward stirring the pot rather than furthering discussion. Fortunately, those comments are few and far between as most of the blog readers here value the community (as I do) and the ability to discuss things without everyone going crazy.
I do zap comments with links to contests or other opportunities if they are things I would not recommend. I'm very careful about what appears on this blog because casual readers don't remember if someone other than me posted it. They think "I saw that on her blog; it must be ok."
If you have any questions about what's ok to link to, drop me an email. I'm always glad to take a look. I value the chance to see and hear about things I don't know about, but I just want to make sure they are things we DO want to see!
I do try to let you know if your comment has been zapped. Those of you who do not have contact info on your website, or linked to your posting name---well, I try but don't always succeed.