What is wrong with people?

So I wrote a blog post about how I was unhappy with HP customer service.  I received a comment on that posting.  It did give me a recommendation on a printer but had a huge commentary that I didn't feel I wanted on my blog, so I deleted it.  It is my blog after all and I have every right to decide what goes on it. 

This is what I received in return. 

At first I was angry, who wouldn't be?  Then I realized how sad it was that a person wants to stalk my blog because I deleted a comment.  This is exactly what I was talking about in the HP blog, people are no longer nice.  Do they think because they do it Anonymously and online that it is okay?  Is this how people vent their frustration.  Poor customer service and poor attitudes is what I see a lot of now days.  I guess I am getting old when I think "what is this world coming to"