Avanti, amongst other operators have a ‘power’ focussed attitude to social media. They will block individuals that may negatively effect their revenue stream (even if it’s an unlawful one). For example when they give out incorrect advice to a passenger and their advice is revenue positive (they’ll make more money than they’re entitled to) and someone corrects them (politely, firmly, however) then it’s an internal policy to block such individuals because it interferes with revenue.
Example (different operator) a passenger asks if a ticket is valid on a specific train in the evening peak. Gets told NO, this is a peak train you need an anytime ticket, what’s more they were told they would have to buy a whole new ticket rather then excess.
I corrected them and told them there are no evening peak restrictions on that ticket so it was perfectly valid. I think I even linked to the restriction code on NRE . They replied telling me a peak train is a peak train and I was blocked, because the operator does not want me telling passengers their rights because that affects their profit.