The whole point of posting a comment at a blog or a web site is to get an increase in traffic back to your site or blog in one of two ways:
Ideally you want to benefit of both. However if you post bad blog comments they won't get approved and you will only succeed at annoying a lot of blog owners and wasting your time posting comments.
What is a bad blog comment? A comment that is spun from a mass blog comment posting software program that produces a generic comment that makes it obvious to everyone you never read the blog post or web page.
Example of bad blog comments:
These types of comments offer nothing of value to the site or the readers. They merely succeed at annoying the blog or site moderator that he/she has to deal with (delete) the comment in the first place.
To leave a good blog comment you have to make sure you do one thing: READ THE BLOG POST!
How else can you possibly leave a comment that shows you read the web page or blog post.
You simply need to spend a couple of minutes reading the blog post and then about 30 seconds to fill in the textboxes. At that point you can click the [ create new ] to create a meaningful blog comment that incorporates a combination of what you entered into the three textbox plus spun content.
Bottom line is you don't have to think very long or very hard to create a great comment that will get approved and provide a valuable backlink. If you take the lazy approach and try to get a mass blog spam posting software program to do the work for you I guarantee Google will bite you in the ass for it, if not now, later.