1. If everything referenced was positive...NO it may not be harrassment. 2. What is the nature of the other 70%? If it is typically relevant...NO it may not be harrassment. 3. If all comments are negative...especially if remainder of posts are commenting on other posters...YES it may be harrassment.
Lastly, if posts are on many different boards and quickly follow a post made by the target...not only do you have harrassment, but you may have a cyberstalker.
David Weed aka the Bird of Prey www.warp-drive.com