Ad in one name rating comments in another name

When looking through various ad's in the Classifieds I also look at the ratings given. On one ad I noticed that the ratings given were for someone of the same surname but different first name. Obviously a related member using this members account or so it appears. The comments given for some of the ratings are not that bad but at the same time are not the great and do send some alarm bells ringing. The ad is in one name but the ratings and comments refer to another name...is this normal and acceptable practice or should each member, despite being related, deal through their own seperate account?

There is not enough information in this post to really make any judgement calls. If you would like to privately send me information about the ad(s)and/or users involved I can take a look at what you are referring to. Thanks!