Given that it is illegal to use, possess, grow or sell marijuana in Australia, I would say the answer is fairly self-evident: simply stop growing marijuana.
Fences , or move the plants.
Yes, you could get in trouble.
pepper
they are having a little sleep
spray them with chili
Thorns and a foul taste.
plant horse repelling plants around the bush
it will stop you from eating poisonous plants
Some desert plants have spines or thorns, some have a bad taste and some are toxic if eaten.
For indoor plants, try spraying a little vinegar in the soil. I know that for outside plants, you can drop mothballs around them to keep cats out.
Stop using marijuana.
I really need to know the answer to this for my daughters homework, does anyone know who to stop FLIES and SLUGS?