of course they are! we can all be brave behind a screen of safety, where there are no repercussions or consequences for being A**holes!! (i realise the irony of me having no picture - but at least im not posting anon!)
NO. Ouch!! Not anonymous. Just because people don't agree with you, doesn't mean they are a**holes. And neither are they cowards for being anonymous. Different people have different perceptions. It's normal human behavior to be reluctant to give a negative opinion, face to face. Thanks to anonymity, people can overcome that feeling.
It's easy and cowardly to post rude comments anonymously. How every just because you feel comfortable showing your face on the Internet, doesn't mean everyone is. It has nothing to do with not wanting to let people judge your looks, and has more to do with not wanting real life friends and future bosses to find out we are on gag.