I really don't think that this is a fair appraisal of this. It's a really novel look into how our habits identify us and the creation of it, in itself, doesn't reflect any mal-intent. If you're really so disheartened by the potential use-cases of typing ID like this, you are now aware of it in the first place! You could set out to build a simple tool that randomly adds noise to your keyboard IO and effectively stops this from working. Past that, this is something that others have almost certainly already figured out (be it big tech or government entities) but, even if they hadn't, creation like this is cannot be considered a wrongful act because it's impossible to know the long-term effects of anything before it exists.