I imagine this is precisely the purpose of Barber's 'besmirching' clause in the T&C. Lifetime bans incoming once the CCTV footage has been examined and the holders of all the deliberately sabotaged upside-down papers have been identified.
Not everyone got into the spirit of things................
https://www.brightonandhovealbion.com/news/1524632/two-fans-arrested-after-homophobic-abuse
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