Just because someone plays for a long time doesnt mean he's not cheating. Just because you are in a respected clan doesnt mean you're not cheating. Just because you are an idol for some doesnt mean you're not cheating. Just because you have clean pbss doesnt mean you're not cheating.
Your arguments are all invalid.
Most probably, pit-23 specated for quite a bit of time until he saw him cheating and so he banned him. Deal with it.
Pit-23 spectated him for a few rounds, I've been spectating Orso since 2004. Pit has the knowledge of potential hacking tools, I have the knowledge of the map. Since we both have based our arguments on our own experiences in our own respected fields, I think the final verdict must be based on physical proof. So lets state that all above arguments are invalid inclusive Pit-23's own opinion. Lets get to the facts:
BTW the Dutch law system (EU system) states that the defendend is innocent unless the contrary is proved. But anyways why do you wanna use the EU system since this is technically much softer regards to proven suspects. Here in the EU he wouldnt get a permanent ban, but has to mow my lawn for a week.
Battletracker D3n@tur@t -
We can assume Pit has based his verdict on D3n@tur@t last match. Let take a look at how this one is extraordinary good.

D3n@tur@t -Session: -=IGC=- at 31-07-212Kills per hour: 114/6.5= 17.5 kills per hour
Deaths per hour: 61/6.5= 9.4 deaths per hour
Total rate on bridge:
Kills per hour: 4116/236.2= 17.4 kills per hour
Deaths per hour: 1809/ 236.2= 6.7 deaths per hour
Seems like a average game huh? K lets compare this to other bridge players:
^Rx][.1m50ry!.http://battletracker.com/playerstats/aao/810023/%5ERx%5D%5B.1m50ry!./Total rate on bridge:
Kills per hour: 1822/78.3= 23.3 kills per hour
Deaths per hour: 631/78.3= 8.1 deaths per hour
!n$^-syn.toXhttp://battletracker.com/playerstats/aao/318860/!n%24%5E-syn.toX/Total rate on bridge:
Kills per hour: 21597/1131.8= 19.1 kills per hour
Deaths per hour: 8244/1131.8= 7.3 deaths per hour
-=e!V].^R!$kXhttp://battletracker.com/playerstats/aao/792314/-%3De!V%5D.%5ER!%24kX/Total rate on bridge:
Kills per hour: 31627/1926.7= 16.4 kills per hour
Deaths per hour: 21306/1926.7= 11.1 deaths per hour
pit-23http://battletracker.com/playerstats/aao/812911/pit-23/Total rate on bridge:
Kills per hour: 73/12.2= 6 kills per hour
Deaths per hour: 169/12.2= 13.9 deaths per hour
There doesnt seems to be any unuasual signs regarding to potential hacking. His K/D ratio are balanced and compared to skilled bridge players he seems to be normal.
PB ScreenshotsI have highlighted his top three sessions from which 2 are played on the Vertigo server. The Screenshots from that server can be easily obtained through public databases.
Session 23.07.2012http://90.146.231.194/svss/pb002059.htmSession 22.07.2012http://90.146.231.194/svss/pb001675.htmRandom screenshothttp://90.146.231.194/svss/pb000194.htmscreenshots seems normal. You rely on the assumption he is using undetectable hacks... well like Zoxee stated we must come up with evidence which contradict this, but there must be also some sort of evidence against him.
ExperienceThis shows how much experience this guy really has on Bridge compared to others. I added the hours from Orso because that was his main account.

Now you tell me we dont know how to spot hackers after all those hours on the map? Yes we do and that is why there is so much controversy in this thread. I strongly believe in Pareto's Law which state that in many phenomena 80% of consequences come from 20% of the causes.That means if you get rid of the 20% legit bridge players you can hit 80% of the community. I strongly believe in this!
Reconsider your decision because with this many players backing him up and with your only proof of spectating him for 5 or so rounds there is a great percentage chance that you might be wrong in this one.