I actually do think they care. Now more than ever. Blizzard does not react quickly though.
A few months ago, these paladin botters were in Halls of Lightning, (and Hunters were in shattered halls). I was constantly reporting 49 people in both halls of lightning and shattered halls for weeks. After awhile I rarely saw paladins in HoL or Hunters in SH. Now i'm seeing paladins in BOT (this was a popular botting place before if i remember correctly). So now I am going to spam Blizzard with pictures of people botting Botanica. Eventually they will probably get it sorted out.