Thank you for this good question.
You are right the security of our futur dapps is a major point to the adoption of NeuroChain.
Some coutermeasures are designed. The first is that the dapps are not running in the core of the bot, it is an independant layer dedicated to dapps. This means dapps will not interfer directy with the ledger. They can read the ledger, use alogrithms based on data from it and then create transactions. It is not fully integrated.
Dapps can have some bad stuff inside their design, but this is not a specific problem of blockchains, it could be the same in a basic website.
With ML and AI and the consensus based on the trust of nodes, dapps like this could be easily put in quarantine.