Legal or ethical problems with blogging

An ethical problem with blogging is the fact that anybody can see what you write. Some people believe that this is a problem because of peoples safety. People believe that there is to much information online that could lead to ones safety being in jeopardy.

What is HTML code? What are mark up tags?

HTML stands for Hyper Text Markup Language. According to w3schools html is used to describe websites. Html uses mark up tags or html tags to tell the website what to do.

Are Social Networking Sites Blogs or WIki's?

Social networking sites are blogs. They are blogs because different people have there own pages where the post new information. They keep these pages updated and usually post frequently. Wikipedia says social networking sites are focused on building relationships between people who share interests.