[namaemuta]

I would consider that an addiction as much as I would consider a carpenter to be addicted to a hammer. At least for the scenarios you have described. If you can't stop using those tools for no other reason that you don't feel capable of stopping using them, then yes, you are addicted. But if you need them (because there aren't other alternatives available like an in-person course) or it's more comfortable using them (for example, avoiding the annoyance to go the cinema to watch a movie with the queues and all that), then it's not an addiction.