He was trying to help you - and the people who administer this site so we can have a natter about OUFC - mate.
We might not like it but anything that is posted on here - same as anything Tweeted, or put on other Social Media platforms - is published. Anyone minded to could take action any a post / comment where they're called a "crook". I imagine that - for example with nobody particular in mind!! - a property developed with his eye to a deal and opportunities to make money, or spin things in his favour could set their lawyers after anyone who used that particular comment about them..... You might not care, maybe you could afford any potential legal fees or the time associated on dealing with it.... but I suspect the admin of this site don't need it.
Hey ho we live in a 5h1t world huh.... but don't call the person giving you a tip to make your life easier the a Daily M**l reading whatever... they're trying to do you a favour.
If you still feel like it and you want to make your feelings known why don't you Tweet what you said on here and make sure you send it to Kassam, or a Firoka account, or to any accounts linked to his nearest and dearest.... at least that way you expressing your opinion on that forum wont cause this forum any problems.