Here what I thought about blogging that you risk if you are not careful.
1.} be careful of what you write in your blog. If someone,or your boss,read it ,and didn't like it,she/he may fire you.
2.} be careful when copying an article or photo without permission
3.} be careful: the things you write in your blog might damage your reputation
4.} be careful not to expose your personal identity such as your real name,full name and birth date etc; someone might use it to get into your bank account,credit card etc.
5.} remember: what you wrote in the internet is always there forever. even though you deleted them, theyre always as recorded.
be creative, be original
have fun blogging ! :)