Even if he cheats, he won't find anything here.

If we're talking about enforcing the rules, there should be a system of strict bans, both by IP address and by hardware, so that if someone cheats, they won't be able to play again.

There is such a system, and of course, cheaters are banned, not just their accounts.

However, even a ban on an account isn't as harmless as it seems: a negative reputation is shared across all accounts, while a positive reputation accumulates for each account separately. With each new account, the former will accumulate, while the latter will be reset, and no one will want to play with that player.