As the actual developer of the tool that was used, porn filtering was something that was added later on, after the porn became a problem. The issue is that try

As the actual developer of the tool that was used, porn filtering was something that was added later on, after the porn became a problem. The issue is that trying to filter such things is often a losing game, as most conference NOC staff don't want to put in proxies for a variety of reasons. The solution I ended up with was to use Yahoo's trained machine-learning algorithm to attempt to detect, score, and ignore images on an unbounded scan (generally from 0-100). In most cases the threshold was set to 70, however was something folks could independently sat if they ever wanted to open the front-end on their own machines. There was also a mechanism to blacklist images from the screen if one happened to pass through. I've run it at BSidesLV, BSidesChicago, Thotcon, CircleCityCon, BSidesDetroit over the years and I can tell you, monitoring and trying to block porn from hitting the board was generally what I ended up doing while running this.