After uninstalling WSA, the core and sky services persist, causing problems with other software. Because they are placed as system files, they resist normal and reasonable means to remove them. 

They also resist removal by people with some technical skill. And other AV programs. And Webroot’s own cleanup executables. 

I would think that software that cannot be uninstalled by the computer owner with reasonable effort would qualify as malicious. 

Of course, sending in a support ticket has gotten zero response. I approach an hour waiting for someone to pick up the phone.