And what did your husband learn from this fiasco?
Most people should learn 1 simple rule from their first time being compromised in an MMO, and that is to NOT click the links you see in chat getting spammed all day. Yes, despite what your husband told you, or you may think, that is what happened, that is how he was compromised (Not hacked), he is the one who willingly went to the website, which caused this, not you, not anyone else, him.
It has absolutely nothing to do with SE "Security". He could have bought an authenticator/one time password if he wanted more security.