回复：求助--打孩子屁股， MA Department of Children and Families 要过问

体罚明明是合法的，而且楼主说了连痕迹都没有，MA-DCF凭什么管？不过看的出来，麻省是比较左的。我猜想你家访的时候动词一定要用对，不是hit， 是spank。

Wikipedia：

Despite some opposition to corporal punishment in the United States, the spanking of children is legal in all states. Bans on the corporal punishment of children have been proposed in Massachusetts^[36] and California^[37][38] but have failed to secure passage.^[39][40]