I have the Goblin V2. If you coil, wick, and screw it correctly it will not leak.
Mine has never had a leak.
As for the screw, I always snug it tightly. It's a small screw with a large plus in the head, indicating you can use a large screwdriver to get additional torque, thus snugging it tightly. There is a limit, of course.
But IDK about other RTAs.