So, let’s assur any activity that might possibly, however remote, result in injury.
Golfer, it’s hard not to notice when 1.someone grabs an entire plate of Kishka for himself 2. When someone elbows you out of the way to get a chulent refill 3. When someone stands eating at the table and refuses to move etc.
Avram, boorish behavior is in the eye of the beholder. By your definition, a frum slumlord is committing an avaira by putting the lives of his tenants at risk ( bad wiring, no heat hot water etc)