I have not, and I would like to address your comments about marriages of convenience. Absolutely there are marriages of convenience, but the issue is, how do you determine that?
If people are just called on the phone, a person who has been trained by a fraudulent consultant on what they are supposed to say can easily answer questions, so the officer is likely to determine it's not a marriage of convenience. In cases where they apply by themselves, where it's a genuine relationship, and where they have not prepared for the interview, they are more likely to give answers that lead the officer to think it is a marriage of convenience.
We need to examine how applications are assessed in the first instance so false marriages aren't allowed to come through and genuine marriages are processed accordingly. Asking about age is not appropriate.