Apologies if someone has already made this point....
When you buy a ticket on seagullstickets.com you accept the terms and conditions. There are no terms and conditions on the site for away ticket purchases, so you are subject to those printed on the ticket itself, which will make no mention of name, and the issue of transferability only prevents you from selling it on for more than you bought it for.
I bought a ticket for Leeds. I can't go. I give it to my brother. I have not breached the terms and conditions of purchase, nor has he. He has a valid match ticket in his possession and can't be refused entry. End of story. I don't see how the club think they can enforce a rule that doesn't actually exist. It seems about as well thought through as the Trump travel ban!