I don't think away fans are considered much of a threat. The home fans however, as documented in many posts by 'Working Class Pride', have been travelling the country in huge numbers for the past century, and garnered quite the reputation for their ferocity. It is little wonder they are...
I presume that whilst home fans are being assaulted and harrassed, the away fans are still receiving their 'thank you for coming' courtesy leaflets, in order to preserve the famous 'Amex Experience' oft espoused by Mr Barber?