Drawing attention to a specific user and their detrimental behaviour

[Raumplaner]

How can this be the problem to the issues described by Niverio?

This alone would also not be a problem in itself. If a user of the portal wants to cheat both themselves and other users by just entering solution codes from other sources (which are commonly available with the resurgance of so many amazing youtube and twitch channels and their videos/vods, plus solver softwares available) and boost their stats that way, that is also their own problem.

I think the problem is that people publish the solutions in solving videos. This should be stopped.