13.12 You, as the Season Ticket Holder, will be held responsible and liable for the behaviour of your Guest. If the Guest breaches the Terms & Conditions of Entry, both you and the Guest shall be held liable for such breach in accordance with these Season Ticket Terms and Conditions and any other applicable terms and you and your Guest will be sanctioned in accordance with the Club's sanctions tariff set out in the Club Charter (which can be found at https://www.brightonandhovealbion.com/club/club/club-charter).Whilst acknowledging that point, I'm not sure how the club can hold you accountable for the behaviour of someone you have bought a guest ticket for.
Surely they can only take action on that person.
It's in the terms and conditions. You are legally responsible for the behaviour of your guest.