Don’t go doing something
Definition 1 of 1
Pro Tip 1/3Cautionary Tone
This phrase often warns someone to be careful about future actions. 
Don't go doing anything reckless with that equipment.
Pro Tip 2/3Preventive Advice
The phrase is used to advise someone against starting something potentially negative. 
Don't go spreading rumors about your classmates.
Pro Tip 3/3Colloquial Usage
It's commonly used in casual or informal conversations, not in formal writing. 
Don't go doing something silly while I'm gone, okay?