*If* Mikeyy Mooney did make a sincere effort to warn Twitter (quite a big "if" to my mind, as it hasn't been suggested before) and they ignored him then his response should never have been to unleash the worm.

*If* they had ignored him, a better thing would have been to have gone to a security journalist, demonstrated the flaw to the journo, and allowed the journo (without publishing details of how to reproduce it) to write about it. You can be sure that would get the attention of Twitter's powers-that-be.

But the fact is that there's no suggestion that Mikeyy has ever contacted Twitter to work out a responsible way of disclosing the flaw. Instead he endangered many innocent Twitter users and disrupted the business.