Definitely a stalker of Jackie O
The film does a good job of covering the first amendment debates; general ethical questions about paparazzi and privacy; and the symbiotic relationship of celebrities, photographers/media, publishers, and the fans.
Regarding the question of the subject, Ron Galella, and his "relationship" with Jackie Kennedy Onasis, I feel there is no doubt he was a serious stalker. In his own words, even, Galella admits that his obsession with Jackie grew out of proportion due to lack of a wife/girlfriend at the time. That is a clear insight into the pathology of his behavior. The lengths to which he went in order to trap the object of his obsession (going so far as to date Jackie's housekeeper in order to troll for information) were offensive, and it's a pity he did not do some actual time in prison (especially after breaking the terms of the restraining order).
I loved how fellow bottom feeders (e.g. Liz Smith) defend this creep.
The tone of the documentary was too forgiving (even as it portrayed a number of clear enemies of Galella and his cohorts.) But it did a fair job of introducing us into the mind and world of a man who feels the need to suck fame out of icons, as if rubbing up close to stars makes one a star. Telling moment: that last shot of him doing the Hollywood Walk to Fame routine on a square in front of his home. Pathetic!