The disabled supporters’ section is below where visiting fans are housed.
Manchester United Disabled Supporters Association (MUSDA) says flares, bottles filled with urine, coins and pies thrown by travelling supporters have landed in their section.
Netting was used for Champions League games against Juventus and Young Boys.
Now MUSDA is pressing to make that permanent.
A recent fans’ forum meeting was told: “If granted, it would come as a great relief to all those who have suffered over the years from the various items that have been thrown in our direction.”
It is understood the club have the procedure under review and are making decisions on a case-by-case basis.