to spot out on online world rather than on physical ones and its not really that deniable.We cant really that tell and even if we do able to see and notice it then as regular fan or people
then what are the things that we can do? Yes, we can observed and definitely tell that those calls are shits specially on NBA refs which it would really be that obvious once they do
make out bad calls which us fans could determine whether its a right one or not but there are indeed times which calls are really that off which you could really make yourself
that too reactive whenever they do made those.
Couple years ago, a caster who's been in the scene for a long long time mentioned that Match fixing in Dota2 is far more rampant than people realize. Also said that 70% of the teams from South East Asia would be under the scanner if they took the matter seriously.