When you blog, it's your little piece of cyberspace. Within reason, it's up to you what you choose to say or allow and you are answerable only to your service provider, the law and the authorities.
By the same token, anyone is free to use their bit of the internet to comment on what you have written on your bit of the internet.
The internet is not unique. It is the 20th/21st century version of news sheets, town criers, journals, but the output of person A, whether poetry, prose or art, has always been subject to critique from person B.
However, this isn't quite what we have witnessed.
THIS is what we have witnessed:
"Mr van Gogh, I am not keen on this post-impressionist style of yours"
Grow the fuck up, Maria. You are in this position because of your inability to support your claims with a single fact. Stop taking your impotent temper out on everyone around you. If you want people to respect you, stop lying to them. Just fucking grow up.