It also promotes deceit because the picture placed in the profile may not be his picture or it may be a picture when he was younger.
Or the personality your chat mate has displayed online is way different from his actual personality. When you connect with a person, you would always have expectations.
In online dating, you can never get the real intentions of a person.
Of course this can also happen with a guy you met at the supermarket but it is magnified with online dating.
His whole profile could be a forgery while if you had met him in the traditional way, you would at least know what he looks like physically.
It becomes a disappointing experience because the interaction online and in person becomes different.
When you meet a person online who you can finally have a connection with, chances are he/she is residing in another state or country.