I suppose my thought is that cyclists will fairly regularly have experiences on the road that range from annoyances (broken bottles, trucks parked in bike paths, etc.) to near death experiences (or worse). The goal of the site is to try to make something constructive happen by keeping track of these issues. This would include:
A) Letting other people know about it so they are aware. Currently the site is set up so that you can choose to receive email alerts when an issue is entered near your location. Hopefully this can increase safety by making people aware of the issues in their area.
and B) Encouraging people to do something about the problem. This could range from individuals who go back and sweep glass off of a bike path to providing information to help organizations and their lobbying efforts.