I recommend editing your title to remove the word “Petition”. The Blizzard forums are intended to have discussions and threads that only intend to incite likes, “signatures”, or votes are subjected to being locked.
In regards to your concerns about reporting cheaters when you are unsure, my advice is report them. Blizzard does take cheating very seriously and will take the time to investigate reports of cheating, however know that you are not going to get into trouble for reporting a player for cheating and be wrong. I have done this many times in my early days of playing and never had any form of retaliation action against me.