Your definition of snark seems very off. Snark is only ever used in a passive aggressive attempt to tear down another person. It is literally “critical or mocking comments made in an indirect or sarcastic way.”
Snark is never made for the edification of the other person, nor is it ever constructive.
The OP wrote:
“Would you treat someone in real life like that?”
You responded:
“Yes, in a pub”
Your definition of snark seems very off. Snark is only ever used in a passive aggressive attempt to tear down another person. It is literally “critical or mocking comments made in an indirect or sarcastic way.”
Snark is never made for the edification of the other person, nor is it ever constructive.