It’s a matter of using your loaf….
It soon very obvious who’s abusing the rules and simple answer is to ban bread and floating baits full stop and refuse to weigh in those that continue to be that stoopid. Any kind of breeze will cause drift and you’d be dumb to do it and let the fish go off down to someone elses swim.
Dog biscuits, expanders that dont sink, casters that float, bread etc are all baits that strain organisers/club officials, fishery owners patience coz there’s always some fool who has to push it and imho should be publicly outed at the match for being a blatant cheat.
Trouble is most matches are also fished by the organiser and he/she cannot be in two places at once to be in judgement. Better to have simple rules in big letters for even the thickest to absorb and stick to them.