The internet is not legitmate without truth. The internet is not a court of law, so you do not have to tell the whole truth or fill out forms completely, but you do have to be honest for proper netiquette.
Every time you open an online account you must fill out information before your account becomes active. Required information usually has an asterisk or says 'required' next to the related input box. Fill out the required information truthfully because it defines your experience.
There are a lot of reasons not to tell the whole truth. Personal safety is a good reason not to provide your address or phone number when opening an online account. Do not intentionally deceive others and do not assume anything. For example, it is jumping to conclusions to think that a person does not have a job if it’s not listed in their public profile. Do not feel pressured to complete the optional information because you should be comfortable with your online identity.
An avatar instead of a picture of you is acceptable. I recommend using one for any good reason. Again, personal safety is a good reason or maybe you just like the avatar and want it to represent you. Anonymity is acceptable as long as you are not lying.
The bottom line is: tell the truth on the internet; don't pretend to be someone you're not. Be yourself online because you are not anonymous online and others users are real people too. Do not say or do things online that you would not do in reality because you cannot be taken seriously if you do. Your online image is important. Don't ruin it by being someone you're not.
Some people feel that they are anonymous when they are online. This leads them to do things online that they would not do in reality because there may not be immediate repercussions.
Trolls and Ghouls are examples of people who are not being themselves online. Trolls are people who write inflammatory remarks about others in blog comments to get a reaction. There are other characteristics of trolls, but that is the most common. Ghouls post graphic pictures of accidents and other tragedies online.
There are consequences and repercussions for all your actions online and off. You are not anonymous online. Everything can be traced back to you. Anything from your social networking presence to your background can be Googled.
Furthermore, screen shots and routine archiving may save data you deleted indefinitely. This means anything you write on the internet could conceivably be saved somewhere for all eternity.
The video on the right is an interesting BBC documentary on internet trolls.