What is the psychology of persons ?do they suffer from any psychological disorder?

some people use obscene, unprintable language in yahoo answers.some people write, paint pornographic pictures and messages in public toilet rooms. some people telephone to us though they are not known to us and start talking using abusive language. why these people do this? do they suffer from any psychological disorder? how to handle those persons in real life?

Lack of discipline as well as social ineptness.
Some of them suffer from a lack of social grace, simple as that whereas in extreme cases they would certainly fall into the antisocial personality disorder category.Giving them attention for their acts seem to intensify their actions, giving them what they are seeking.
It can also be attributed to thrill seeking and poor impulse control. Flashers, peeping toms, etc.. all start out as benign enough, but progressively get worse as the impulse needs feeding and end up violating the rights of others or worse.

Hope that helps..

most of these people are males and typically have major difficulties in interpersonal relationships.the relatively safety and one sided anonymity of the telephone-allows an idealized masturbatory experience with no need to worry about a facce-to face confrontation. Report It

he directly threatens his victim("i have been watching you", I am going to find you". some people reveal intimate details about her life by posing as sex researchers. Report It

.the compulsive obscene phone caller must be distinguished from the adolescent who occasionally indulges in the same activity as a prank without giving much thought to the distress caused to others(.WILLIAM.H.MASTERS,VIRI... E.JOHNSON AND ROBERT C. KOLODNY, page 383.) Report It

some people who suffer from inferiority complex and having insecurity feelings resort to this sort of behavior . people, who did not get love and affection from their parents and people who are physically challenged, also resort to this practice. Report It

They sure do. They are cowards who doesn't have the courage to utter any of these in the real life or to a real person.
Its better to ignore such people and their behaviour. If it becomes too much of a problem, report to police.

tell them to f' off

Most of the people who do these things are introverts--they would not think of approaching us in 'real' life. They have fears regarding what would happen to them if their public persona's displayed the things they do anonymously--though they probably fantasize about acting this way in the public eye.
They do need counseling--but would most likely be too shy/embarrassed to admit they had any problems at all--to anyone.

On the other side of the coin, some of the people who do these things are doing so due to peer pressure, boredom (something that I don't believe exists--there is always something productive to do), or simply immaturity--which can exist at any age.

i think they just do it because they are bored and want to mess with people