This is indeed the best legal solution. All the other measures - I mean scents (citrus, predator urine), fences, sprinklers, plants (e.g. lavender), dogs - are either unreliable or just drive the cats away, making them someone else's problem.
One more thing that's worth mentioning - make sure there's no unsecured garbage bins around, as those can attract stray cats. Same goes for catnip.
This is indeed the best legal solution. All the other measures - I mean scents (citrus, predator urine), fences, sprinklers, plants (e.g. lavender), dogs - are either unreliable or just drive the cats away, making them someone else's problem.
One more thing that's worth mentioning - make sure there's no unsecured garbage bins around, as those can attract stray cats. Same goes for catnip.