Yes - I'm very interested in seeing the official line on this.
Yes, I've seen things regarding blatant cheating at local matches too..... There's "gimmes" and then there's cheating (I've seen an instance where someone said they didn't see the scoring process and demanded a reshoot, when they purposely walked away because they knew they missed).
I try to be pretty fair when RO'ing and scoring. If I'm RO'ing and someone comes really close to a 180 break, and other guys go whoah but it looks ok to me, that's my call. If I have to really really look at a target to determine the score, I'll go to the higher score... But adding or subtracting time blatantly and randomly, when it can be proven by video evidence.. That seems pretty despicable to me.