Certainly, this is not correct negative feedback. He didn't harm anyone here, he didn't even send those coins. His promise was voluntary and a kind of donation and you cannot accuse someone for withdrawing his self-initiated donation.
He can always say that he urgently needs the money and that he cannot afford it at the moment.
Open side bet in EPL Pool. I will finish the season ahead of this CLS63 f**ker LOL.
https://bitcointalk.org/index.php?topic=4479837.msg62668208#msg62668208Side bet of 0.015 mbtc with CLS63
flumpnuggets is going to pay me 1mbtc for sure LOL
https://bitcointalk.org/index.php?topic=4479837.msg62675295#msg62675295Side bet of 1 mbtc with Igebotz.
Arsenal fails to win [which they will] the season title, Mouse gives me 1mbtc or I give 2.5mbtc. Side bet.
https://bitcointalk.org/index.php?topic=4479837.msg62681699#msg626816991 mbtc side bet Little Mouse.
The losers will pay the winners. I don't think anyone will avoid a trade risk feedback if they do not honer the bets.
I do not see any difference in Symmetrick Ratimov's promise too. He can not deny a trade that was agreed between him and other parties.