This is a real URL on LinkedIn: http://www.linkedin.com/groups?gid=2913&goback=%2Enpv_4027428_*1_*1_*1_*1_*1_en*4US_*1_*1_*1_*1_*1_*1_*1_*1_*1_*1_*1_*1_*1_*1_*1_*1_*1_*1_*1_*1_*1_*1_*1&trk=prof-groups-membership-logo.
When I see something like this, I really want to know how they decided to use the _*1 twenty-three times in a row to generate that URL, instead of twenty-two times or twenty-four times.