Do you knock before opening single person bathroom door

Ri

Personally I always knock, in a public bathroom, and at home. Plus I always lock the door behind me. I absolutely HATE when people try to barge into the bathroom while I'm in there, like I get it you have to shit, but I don't think it is worth almost walking in on someone else's private time. Do you guys knock at all, or only for public bathrooms?

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