No, quite the contrary. Regular practice of banishing rituals makes your aura repellent to a wide range of harmful entities, and that provides some degree of protection for anyone you're near; if you practice regularly in a given place, that place will pick up a similar quality, and everyone in that place will be at least partially protected. I've known experienced mages who could literally clear a space of noxious influences just by walking into it -- and that's a function of the decades of daily banishing rituals they've performed.