Hahahaha, pricelessAtleast where i come from, insider info is considerd as a bigbig thing and punishable act. In game this can start with smallest of things like letting certain ppl know when the server is gona restart and checking if isiloon is up, ending up with totally sycryt info.
But the thing is, most of the GMs are from diez and are old members of this forum. Even i know most of them on a "hi mate, sup?" lvl. Nothing rly stops them for giving me info on no matter what subject other than moral lwls.
There are few more thingys that could be summed up as "hard to detect and hard to avoid". The above was just an example.
About the matter of CS, in the end its the same as a normal CS in outside gaming world. So it mostly covers the same faults. I.e "my friends wifes piano teachers brother-in-law knew mr X, who got us the tickets to world cup finals"