Over several years, Married At First Sight Australia and Endemol Shine have allowed both emotionally and physically abusive behaviour on the show without repercussions. Examples of this include Domenica (S9) smashing a wine glass, Paul (S12) punching a hole in a door, Sara (S11) severely gaslighting Tim, Adrian (S12) severely gaslighting Awhina, and Mel (13) openly admitting to stalking exes. The show has not kicked out any of the above contestants despite viewers recognising toxic patterns, abuse, and illegal behaviours. Many viewers have been left concerned about the mental health of many participants throughout the show's history.