Did it change how you feel about interacting with people in general?

This is the first time I've heard of "rejection therapy". It interests me but maybe it approaches the problem in a destructive/negative way (that is, keep doing something uncomfortable until it isn't)? I've learned to deal with rejection by reminding myself that people have their own problems and embarrassing histories; they aren't really that different from me. Thinking about it in a humanistic way like that, instead of a negative/destructive way, lets me get over things immediately.