West Ham co-owners David Gold and David Sullivan will be protected by a fortified London Stadium and a police presence to help prevent a repeat of the scenes that marred Saturday's 3-0 defeat by Burnley.
The club had acknowledged to the complainant that they received his warning and screenshots on 16 February, before responding with the following from the email account for "West Ham United Supporter Services": "Thank you for your email to the Club and I am sorry to hear that you've been involved in an argument on social media".
West Ham Independent Supporters' Association's vice chairman says a breakdown in dialogue with fans over the running of the club led to Saturday's protests.
He smiled: "I just turned round and saw some kids there and thought 'I don't think they're subs!' but there was some commonsense, and there was no problem". The club can't pretend to be unaware of the fears following intimidation to fans.
"Hopefully there are better times ahead for West Ham". WHUISA had been at both meetings.More news: Ten-man Celtic beat Rangers in thriller derby
Under the terms of West Ham's rental deal, the costs of policing and stewarding are covered by London Stadium 185 and paid for by the taxpayer.
Former West Ham midfielder Trevor Brooking, who was also in the directors' box, said Sullivan was struck in the face by a coin and that fans who contributed to the toxic atmosphere should stay away from the team's home games.
Mundo Deportivo go with a headline saying "West Ham fans create chaos" and add some supporters "once again showed their displeasure by criticising those in charge and players".
"I was concerned to read the coverage about Mark's treatment in the Guardian over the weekend and have subsequently spoken to him about his experiences", Streeting wrote in a letter seen by the Guardian. I believe that the club has a particular responsibility to call out abuse and threats when you become aware of them.
"Don't forget, at West Ham I did a medical, I was supposed to sign for West Ham", he said on talkSPORT this morning.