Free throw violations by both teams, not simultaneous

[CoachJW]

Thank you for your input. It may be a stupid strategy, it may be a brilliant strategy. Assume now that the shooter is skilled at missing off the rim and the game reaches the "actionless contest" or "impasse" point (shooter keeps missing, opponent keeps violating, re-shoot, repeat). Is the consensus that you would have a warning, then a technical foul on the next violation? Given that you cannot force the shooter to make his shot and end the insanity, how many times would it have to occur before administering the warning?