Ethereum and vunerabilities of Turing-complete progamming languages

There have been several Reddit threads and bitcointalk forum posts the past couple days regarding integrating a Turing-complete programming language with a cryptoledger.  Bitcoin currently uses a limited, non-TC language called Script.  The comments, feedback and insights revolve largely around the security risks and vulnerabilities that such a language could do.

If you are interested, I highly recommend reading through these threads right now, the first two include comments from Adam Back, creator of Hashcash which is the proof-of-work used in Bitcoin.

Turing complete language vs non-Turing complete (Ethereum vs Bitcoin)
letstalkbitcoin on committed tx, homomorphic value, fungibility, privacy
Will turing compleastness allow contracts to contain viruses and malware that could affect the network in unforeseen ways?
Adam Back about Ethereum and security risks

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