Can a blogger be charged with libel or slander?
Of course. Libel and slander are not limited to printed media, or formal media outlets. If you spread a rumor that the restaurant next door feeds dog meat and know that it is untrue, you can be held liable for any and all financial damages. Bottom line: You are responsible for what you say. Freedom of speech does not mean that you are free from responsibilty for the consequences of that speech.