I think it is related to 'peer pressure' or 'group pressure', a condition where a person is led to think, believe, or act the way the group to which he/she belongs. This is particularly commun in young people.
Disposal means distance, not knowing what the other does or how he lives. Alienation is practiced by someone who wants to keep people away from the society, especially family.
It's "peer alienation;" I think you hit a translation problem there. Basically, it refers to the extent to which a person is alienated from (feels separate from, is not accepted by, and may be subject to criticism or hostility from) his or her peers - those of a similar age and station in life. Mostly you hear about it with school-aged children.