A repetitive attack against a service is so easy to prevent it's not even worth talking about.
A rear wheel drive with less horsepower can't hope to keep up with that. Less overall traction AND less horsepower to drive it.
Say hi to the Atom.
Somebody in the YouTube comments mentioned that in the United States the gun would considered a fully automatic weapon because of the attached solenoid.
Well, fully automatic guns are not illegal, they are restricted and require a tax stamp, and have some manufacturing restrictions. Also, it's not clear that merely having an electrically actuated trigger makes it a machine gun at all. The Tracking Point rifles seem to have a computer controlled ignition system and they are not classified as automatic weapons. The rule is highly dependent upon interpretation AFAICT but basically it seems the key is whether the ignition system fires more than once with a single actuation of the trigger.
I don't see anything clearly illegal here, but there might be local regulations or laws I'm not aware of.