No @captainklaus. I am not aware of that, but I've just seen this is indeed the case in my steemworld. I am going to check that account and take the necessary steps. Thank you for your message!

you are welcome. I am sure those accounts are using your posting authority.
Here is a nice post by @luegenbaron on how to take the necessary steps:

Oh! I truly appreciate it. Thank you so much. I was a bit lost as to where to start. I just downvoted their last two posts so ... it's a start! :)

a good start it is!

@mack-bot, I am explaining here exactly what you told people in your last two posts. I appreciate your effort in fighting spam, but your approach seems to be a bit too general.