Every single person, without exception, you included, would be really pissed off with and do everything to get rid of a rough sleeper sleeping on under their window.
Instead of adding spikes, they will call the police. They would add spikes, but the police are free.
I know this, you know this, I know that you know this, and you know that I know that you know this.
But because it is "others" getting rid of bums, people get to scoff online.
Like I said, it is one of the most deliciously hypocritical things about the internet. It causes my heart to race from excitement whenever I see someone do it.