Always did in apartments. Closing the bedroom door gives me another layer between the neighbors and street traffic. I added rubber door sweeps and seals to further dampen the noise. In a detached home, I'd leave the door open during the day but close it when I sleep for added fire safety. I used to have a *downstairs* neighbor who stomped loudly and my pleas didn't work. So I got a subwoofer and played some low-frequency white noise when I needed to drown it out. *After reading your comments, I'd highly recommend this if you can't move out yet.* They seriously need to build more apartments and condos with concrete instead of thin wood in the US. I miss my old apartment when I was in Germany. Nice sturdy concrete walls so my neighbor could blast music all day without bothering me at all.