Yes, because of the potential pitfalls of undiscovered vurnerabilities like the one in this post, where an attacker could have generated an unlimited supply of coins and remain undetectable. This is in contrast to Bitcoin and other coins whose transactions are public on the blockchain and can be openly analyzed. The other aspect is ethical. Did the people involved in discovery of this vurnerability took advantage of it and made themselves rich by exploiting other cryptonote based coins? Little risk, high reward which is tempting.