I've seen a dangerous invasive plant in a number of customers' gardens. Daphne laureola is known as spurge laurel, though it is neither a spurge nor a laurel.
Daphne laureola is listed by the Canadian Poisonous Plants Information System, the Invasive Plant Council of BC and has a Worksafe BC Toxic Plant Warning.
Though hardy and attractive, it is harmful to humans and the environment. It proliferates via seeds in its black berries which are spread by birds and mammals. It is at home in shady understory habitats and can spread into forests and displace native species. All parts of the plant are toxic and care must be taken to avoid skin and eye contact with the sap. There has been a fatal case of poisoning in which a child consumed the berries.
There are a wide variety of plants which can take the place of Daphne laureola in your garden. Some suggestions include: Mahonia, Skimmia, Rhododendron, Vaccinium, Helleborus, Polystichum munitum, Gaultheria shallon, Gaultheria procumbens, Paeonia, Brunnera macrophylla, Hosta.