That is an anecdotinal data point.. I live in a building with 6 units in the Mission district of SF. Until a few years ago my neighbours were people: families, (gay) couples,.. We now have 3 startups in our building. One of the startup (YC-backed!) moved out yesterday. The guys just threw what they didn't want into the street from the windows of their second floor apartment. And disappeared, leaving a filthy mess on the pavement.