I parsed game data and [rendered web site to navigate over it](), simplufying life for players of space simulator. That is usage for good. If someone will parse a lot of private data from social networks and will use it to scam people or for other purposes like providing service to track people, that will be for evil So, u can help with parsing and harm with parsing. Depends how u wield this double edged sword.
Ooo and you hit an API for the data? Double the skills