I'm more likely to have a balanced setup. It'd be "F$%& (name)" on both so I had symmetry. Yeah, I Am that cynical.
I don't have any political stickers on any vehicle. My fridge, sure. I've got a small "Yes, It's fast. No, you can't ride it." on a helmet.
I simply don't want to walk out to my vehicle in a parking lot and find it trashed. Nor do I want to go to court with a wailing wheelchair riding super victim at the other table. Getting a jury to agree the crippled old man was utterly justified in defending his property and life can be difficult with the violent monster coached by the best Hollywood director to fake Innocent Fragility.
Apparently it doesn't matter if they have anarchy or golden retriever motifs, they are more likely to kill you for ego damage if they get passed and startled or have to accelerate to beat you to an off ramp.
The usual kind of thing that suddenly changes an apparently nice soccer mom ( or dad ) into a murderous cretin armed with a multi ton weapon that might chase you down and cut through a school playground to ram you on your bike.
I don't know how valid the study is, but it fits my prejudices.