[maxerickson]

Your example isn't interesting. It's starkly violent and you isolate the builders from the decision that results in violence.

In many scenarios, the people building a thing will also work to push it out into society and inflict consequences less than death. Do you think they should not consider the consequences prior to "disrupting" things? The fact that some other people might not bother to consider the ramifications of their actions isn't an excuse to act irresponsibly.