The spikes make the place worse for the intended users than it would be if the designers just ignored the homeless in this place and build a better place for them nearby.
That doesn't explain the difference. Just ignoring the homeless can include building things that happen to discourage the homeless but are put there for other reasons. If so, then ignoring them and being hostile to them can produce the same result.
If it's worth saying, but not worth its own post (even in Discussion), then it goes here.
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