One of the problems with "writing " something is that you never get to know if the reader has taken away the intended message, and with the web open to anyone with an internet connection then a wide variety of skills may be demonstrated, or not.
A number of issues can occur, one being language differences or how words are used differently in different countries.
But often we bring our own views, expectations and opinions to an article, based on its headline. Most folks are careful, but sometimes this can lead to a mis-reading the message, especially when you add the fact it is easy to skim through the text very quickly, and often pay even less attention to replies.
Also I've found on a number of forums that there are a few people who seem to delight, not in the sharing or news and info, but promoting a more extreme, provocative opinion in order to generate emotional and passionate responses.
Whatever, if you have an opinion and write it reasonably well, it is enormously frustrating when people respond in such away that demonstrates that they have not bothered to understand the authors view point, even if they disagree with it.