Are these videos showing up in your recommendations? If yes, you can remove them by selecting 'Not interested' on your home page, this will influence how YouTube suggests videos to you in the future. Here's more info: https://goo.gl/mfD7rf . Let us know if this helps.
This is more widespread as you obviously know by now. Why not hold a public townhall style event. There are some very unhappy people who are unfairly targeted by flagging campaigns to have channels removed permanently. This will not end well for YouTube of you ignore the issue