Have a chamber surrounding important rooms in your base filled with narc traps, bear traps, dimorphodons, troodons, and these little guys. The traps will either trap/KO raiders, the troodons will tranq them, the dimos will kill them, and the pegomastxs will disarm them. This has defended me from 10+ attempted raids
When tamed, they can pick-pocket other players. If you get on of these early game, use it against other players. Just make sure you can get away without dying. (Also, they can ride on your shoulder, making them a nice companion to have. After pick-pocketing someone, put it on your shoulder and run away with the goods)
Strap c4 to his back and whistle attack target. People usually wait till it’s close to kill it so they can take any already stolen loot from other players(especially if they think it’s wild) when it gets close, press the button.