Another annoying think that bothers me is posting on blogs.

Let's say, you have a blog or post to a particular site thread about your passion - let it be recipes, tourism guides, celebrities etc. You do some good work and after you face unreasonable criticism, arogant stuff or additional identical material from people always sure of knowing better than you. Of course, constructive criticism is good but web attacks from ill arrogant people or trolls could take this desire of sharing your experience.

In real life could be harder of course.