Although I agree with everything you wrote, I sincerely advise you to not worry too much about the cheaters that are “lurking” around here…
Firstly, because, more or less efficientely, measures are taken or will be taken to identify and ban the cheaters… and secondly, well, as you well put, they all scored 0.735, which means that they got quite far from the very best honest solution… And if they really did only copied and pasted the code, it will be their own loss since they won’t gain absolutely nothing by doing such thing… They might be happy with an extra 0.735 points NOW, but those kind of cheats never resist to a new problem and to time…
If they copied, they won’t learn anything that’s actually useful for them in terms of accquired knowledge, and, to be honest, isn’t the fun of these contests to be able to improve and learn new things in a slow, methodical and honest way?
Isn’t the joy of enlightment or discovery of a new concept infinitely many times better than a green tick? In my opinion, it sure is!!
So, I advise anyone who reads this to stick to the honest way and the gains will be infinitely more valuable than a bunch of extra points, trust me!!
I also would like to applaude once again the user who got the courage to stand up and confess the cheatings done, it is the first step towards improvement