First of all, you need to make sure that the cause is known. Every demonstration, every strike, has the primary goal of raising attention. Yet, every strike, every demonstration inconveniences people and as such may make enemies.

I wasn't trying to make the case that it's the best way of doing it. Nor was I even implying that it's a particularly good way of doing it. But I do think that sometimes, it's the only way of doing it.

Also as an aside, I think there's deeper societal problems that we need to face if a few people lying on a road and stopping others from getting to work on time results in those people being considered "enemies".