One time I got hacked by some company I'm assuming that arranges plays for small artists, they deleted the listening history on my spotify but unfortunately for them I also scrobble my music via last.fm, so it wasn't difficult to figure out which artist was cheating. I confronted the artist about it, they acted like I was someone they knew and was trying to sabotage them (aka they have issues with multiple people, seems healthy). I reported the abuse, to the point of actually talking to a human at spotify and they said they would get right on it and remove the artist/user. They didn't. After I told the artist that I'd report them they also let that same company/person try to hack my paypall account, also passed that along to spotify, still didn't remove the artist. Crummy company, terrible customer service, and I'm left with a lot of gray songs in my lists.