It went off at random moments playing screeching sounds at high volume, and I had very little control over it. Sometimes it wandered off in a random direction regardless of safety or other people. Sometimes I could coax it to be quiet and be still, and sometimes nothing I could do worked and it would go on and on until it went quiet on its own. If I brought this machine into a coffee shop or restaurant or store or library or theater, I might get some dirty looks from all those selfish people who were expecting some quiet time.
If I were to impose the sensory effects of my choice on others, I would certainly hope I would not try to induce others to join the club. I would hope I would be able to respect the fact that others without screamachines may not want the hassles that go with them, or else they would have them. Who knows, maybe the people out in public have machines of their own and just wanted a space outside the home where they could get away from their own machines.
When are you going to get a screamachine of your own?