Standard GMod settings aren't enough. Plugins like combined with APG can detect when a player is attempting to spawn a "lag-heavy" or "invalid" entity. These tools can automatically kill the spawning process before the server's CPU hits 100%. 2. Limit "Prop Spawning" Rates
Crashing can occur when a server is forced to process too many entity parents or constraints in a single tick. Parenting Bug gmod server crasher dupe verified