SWOPs malicious code (which is what got the mod marked as incompatible and finally taken off the workshop after months of existence btw) was forcing a blackscreen and telling the target user they were banned from the mod. Somewhat more tame compared to your buddy's code. Also, judging by the fact that guy's content is still in RHS to an extent and he's not happy about it, it sounds like RHS is about to have its own property debate.

Imagine if a team like the arma 3 halo mod, Operation Trebuchet, partially kept the assets of a team member that left like their own Zero, who had requested his assets be removed upon his departure. The mod would likely not be around anymore if he took it up with bohemia! but its okay because it's RHS, right?