Absolutely, but it’s a worldwide Jewish problem, that we open our hearts & homes to people we believe are Kosher Jews and they aren’t. Look at the growing numbers of Russians who immigrate here, purporting to be Halachic Jews but who aren’t.
When our first child was getting married in NY (we were from UK) we went to the Beis Din with my Ketubah. The Rav was shocked, waved my husband away & told him “no need.” Meanwhile, even though we had lived there for 12 years we had no family there, no one to vouch for us Jewishly. We swore then that we would only make shidduchim with people we knew or if the shadchan knew the family personally. And that’s exactly what we did.
I can’t begin to imagine the Halachic implications of what went on here, and the trauma to everyone they came in contact with. Deport them & spread all their details around the world. If the JA could put us through the ringer when we made Aliyah, how did these con artists slip through the net?