Note what other people in this thread are saying.
Sorry, but being a developer I can tell when players are just repeating half-truths they read online.
There's no reason why strategies that work in any other kind of computer science shouldn't work in gaming.
In fact, it sounds like you think a 'ban' is something bad to these players or will stop them. If it did, I'd probably be enjoying Rust still.
The difference between an attack costing $0.00 and $$0.01 is enough to reduce attack volume by orders of magnitude.
Even just costing the attacker 30 seconds is enough to have a massive effect, which is why captchas exist.
Game keys tend to be in the $1 - $5 range, which makes bans an extremely useful tool.
We also have a standard socket and a high power socket.
Expect our normal outlets provide 230V 16A 3.5kW (3kW sustained) and the typical high power outlets outlets provide 400V 30A 11kW or 400V 60A 21kW.
Which is why typical electric stoves here use 11kW and typical instant water heaters use 21kW.
Though probably the most noticeable advantage is in electric car charging.