The fact that the game literally offers the real name you have attached to your computer as the default name for your character in-game got me a little bit suspicious...
For some reason when it asked me that, I had flashbacks to old MGS bosses (Psycho Mantis, anyone?) causing static, input and volume problems, and requiring you to unplug your controller. Was a pleasant reminder of things I haven't thought about in years.
It seems like a ren'py game being able to check directories to determine current username is a relatively non-invasive operation. I mean shit, the Happenstance folder is already residing within my "Business Travel Receipts - DEFINITELY NOT PORN" folder, so it's kinda already located in the most sensitive location on my pc.
Although granted I don't keep financial records or sensitive personal info on my designated porn hard drive; got enough devices that I don't have to stress that much if a sketchy download forces me to format the drive- it'll just make me spend weeks re-downloading my disturbingly extensive game library.