You are still assuming a lot of things:

1. That deflated tires don’t get damaged either. Look up how tires are built.

2. That everyone gets a sticker under the window and all four tires deflated.

3. Apparently it has to be “catastrophical” to be bad.

4. The only thing you are taking away from society is someone’s time.

IMO as long as you are messing with someone else’s property you are not “protesting”, you are a vandal.

However good you might find their intentions it’s not much better than blowing up mailboxes or slashing tires.

And whether or not you want to see it I strongly believe that point four is the most important part.

What happens to the people who couldn’t be treated at the hospital in time because their surgeon was left stranded with flat tires?

Sure, he could have just called a cab/Uber, but what happens when everyone in the neighborhood does?

Someone else could step in? Sure, but again it suddenly might be more than one that’s affected.

I’m not trying to argue that everyone has a job that society will miss if they are stuck at home for a few hours, but do you think that the people running around deflating tires do any kind of legwork to figure out if they should?

There was a “protest” like this in Oslo, Norway, recently, targeted at fossil gas guzzlers. However the “protesters” failed to discern between electric SUV’s and fossil SUV’s even though most of the electric ones carry special license plates.

At the end of it I guess it all boils down to what kind of ethics you apply. While I can agree with the viewpoint I wholeheartedly disagree with the method and form.

At what point do you find it is ok to do bad things to random strangers in some weird hope to do something good?

It’s not a “trolley problem”, you’re not killing one person and saving five, you are simply putting unnecessary hardship into people’s lives because you don’t like what they drive.

Do you honestly expect someone to go “oh no, not again, well I better go buy a different car”?