AITA for barging into an office and telling them to make stop their fucking kid from opening our office door?

So I work in an office building with different offices on each floor. Every afternoon one of the lady’s in a different office brings her kid and allow him to run up and down the halls constantly opening and closing our door. Yesterday I fucking had enough. I opened the door just as he slammed it and I yelled at him to stop fucking opening and closing our door. I then barged into their office and told them I didn’t know whose fucking kid that was but they better make him stop opening and closing our fucking door. I then filed a complaint with building management. This morning apparently I’m the talk of their office. “That’s her… that’s the lady….” Yes it’s fucking me and maybe if you weren’t such a useless fuck of a parent maybe your bitch ass kid wouldn’t have gotten yelled at. This kid is at least 7 or 8 and should at least be taught some fucking common courtesy. I work in a law office while they’re nothing but fucking telemarketers.

Edit because apparently a bunch of pussies were offended. I don’t give a fuck that they’re telemarketers. The point of that final line is because of the type of people who are telemarketers. If you know, you know.