I lost to a cheater, and I would like to know who...

@Serg_Dolgikh said in #8:
> It still seems to me that having someone who plays well, and he will play for you, is not a crime

Sounds like one of those guys who used to pay somebody else to go to war for em...

There you go.

No, I'm not a cheater in particular. The question is whether it should be regarded as something illegal

not illegal, but against the TOS, rules you agreed to when you signed up (even if you didn't read them).
I think its a reasonable rule. Anyone who wants to play can open their own account.
And lichess would like to analyse and monitor the performance of individuals to help in detecting cheating. If you were permitted to let someone else play on your account that becomes more difficult.