The problem is FBW that people get a bit sick and tired of crewing or screwing as you call them being bashed. I've worked in a crewing dept for 10 years and am privileged to work with some very talented people who know the job inside out. To be accused of creating such unbelievable rostering patterns just p's me off a bit.
AIMS is not 100% fool proof at Rostering stage so anything you find that's not legal will be rectified the moment it's pointed out and it won't have been put there on purpose. AIMS at a Crewing stage is different and anything illegal will be rejected by the system therefore it's not possible (in the airline I work for ) for crewing to make you work an illegal roster. More crew should take the time to learn the rules that govern their lives.