Yes, until the cheats are changed again, like they do quickly.
Yes you did. Writing your own anticheat like many of us have.
There are ways to combat this.
For explosions see here
For “spawning things” see AntiCheese that has examples of how to blacklist objects. See here
For “attach windmill to everyone” same concept as objects blacklist. Check for objects attached to a player ped and delete the objects.
It’s really not about FiveM not providing you a better solution, as a server maintainer/owner you have to engage yourself, take responsibility and combat them using your own detection methods. Cheaters will always exist, no matter how much “anti-cheat” FiveM throws at them. That’s the nature of the beast. Every single game has cheaters. It’s up to you to also detect cheaters that bypass such.
You buying an anti-cheat is just a lazy way to combat them and you giving in to the protection racket that these cheat makers setup.
See How To Create an Anti-Cheat - List of Vulnerable and Abused Events (Updated January 2020) and How hackers can exploit your servers and what to do about it for more tips on creating an anticheat.
If others can do it, you can too!
Yes definitely! But remember, it’s a cat and mouse game.