I would encourage you to look up aggressive architecture. This is a well known and incredibly common tactic in the west and the US especially

This is in Austin (you can even see an address on Barton Springs Road written on the bus). I know this area well, and those middle arms were added to existing benches specifically to keep homeless people from sleeping on them.

Drive by this area early in the morning, and you'll find all the remaining benches without the arms with a sleeping occupant.

I agree. There are certainly anti-homeless benches throughout US cities, but this looks more anti-skateboard than anything. It may not be comfortable or practical, but it IS sleepable.