This sounds great in theory, but in practice it turns into an asshole filter (https://siderea.livejournal.com/1230660.html). In other words, what you've just done is create a set of incentives that reward the most obnoxious people with your attention, and starve those who politely wait. In time, those who politely wait will write you off as a flake, and then you'll wonder why everyone who contacts you obnoxiously sends three e-mails, four slack pings and an after hours text message for good measure.