The scammers were victimizing young people with fake lottery scams.

victimizing 是动词 victimize 的现在分词形式。victimize 由名词 victim（受害者）加上后缀 -ize（使...化）构成，意思是"使成为受害者"或"迫害"。在这里表示"针对...实施诈骗行为"。