I dislike that legal arguments often fail to distinguish cases where scale or speed create something transformative in themselves. Yes you could keep a few people out of a small venue, but good luck keeping a list of 1000 people out of a stadium. The tech creates new powers for large entities able to deploy it that aren't countered by any capacities gained by individuals and small groups. The argument should be made on the basis of what this tech enables itself and not by reference to some old tech that had different consequences.