I don’t like (the neighbourhood) cats. How can I stop neighbourhood cats from spraying my front door? This can be a very difficult problem to solve, as spraying is a very common behaviour trait in cats. The cat is making a very clear statement of territorial establishment or hostility.
I try to discourage the cats from approaching the area where they spray by placing water trays. It seems to work fine, so far. Except for Mr. Bowie.