I suggest to
- optionally hide links from tickets to FAQs
- or to delete them after a configurable time
- or to create a FAQ watch list
- or to make unidirectional links possible,
1. You work on a ticket and link it to a FAQ, so that you or others don't overlook it.
(Usally because of important information to solve the ticket or to remember to update the FAQ. Similiar to the ticket watch list.)