As a former retail worker, I always slightly disagreed with the shopping cart test.
Going outside to get the carts meant going out of range of the radio system that they had all us techs and sales people hooked up to. So in my mind I was like: " fuck up them carts all you want, I'll go outside, get some exercise, and some fucking peace of mind."
No excuse to leave the carts in everyone's way and make parking difficult.
It's almost like people so online as to be proud to call themselves "tankies" (yet whine when people call them that) were literally planning to brigade and shit post.
I'm pretty damn left wing, but these people consider listening to podcasts and taking over the mod teams of subreddits to be revolutionary praxis.