Startup Idea : Walking buddies

It works like uber (not a great start for a pitch, but bear with me :) ), but instead of calling a car, the user calls someone (walking buddy/w.b.) who lives near by to come to a location of your choice and walk/drive you home. To ensure a higher level of security and privacy, two w.b. closest to the user will be picked randomly by the system to walk the user home. It's for people who has to walk home alone but feel afraid/anxious that they may be vulnerable to abuse of any kind and on the other hand also for people who wish to a more active role in making their community a safer place. People can download the app and volunteer to help walk people home or request someone to walk them home. Once they make it home safe, they can choose to donate 1 dollar to the app, the money will be used for maintaining the service and any unused money will be donated to charity groups for supporting minorities/LGBT/women rights.