The 'disguise' thing *could* just have been a case of Tonda not wanting Ipswich to know we were there, rather than covering for something he knew was wrong. (i.e. In a hypothetical world where spying isn't breaking any rules, there'd still be logic in trying to do it incognito...)
Unlikely? Maybe... But still a valid alternative explanation *if* Tonda genuinely didn't appreciate it was wrong to 'spy' in this league.