About the malicious software. (Diablo 2)

No need to invent anything, just go through 2 scenarios.
Legend:
User 1 - novice, Dorval to malicious software.
User 2 - schematic informer, tale-bearer and shit[conscious citizen in Western Europe].

Scenario 1: In the popular social network for students User 1 sends a screenshot of the entire screen with meaningful inside the game thing, on which traces of the use of malicious software in the form of silhouettes of a definite geometric form, but the source is not visible, neither in the taskbar nor on the desktop behind the window(this malicious software allows it). User 2 immediately, dropping feces, brings this screenshot to the email of administration(please note - free and on pure enthusiasm).

Scenario 2: All the same, but exactly the opposite: the User 1 sends a screenshot, which outlines a specific geometric shape within the game no, but the left of the window gaping .exe file with the logo of malicious software. User 2 will immediately run to the mailbox and sends a letter to the administration.

As we know, the administration reserves the right to block users, unilaterally and without explanation.

Occurs exactly 1 question: how to make evidence always missing, and the user is using malicious software was banned, and also banned all of his accounts?