Above aside, how do I actually determine that OCLP is trustworthy and secure? Sure I can look at the code, but without spending days/weeks sifting through 10s of thousands of lines of code (not to mention all of the 3rd party modules) how do I go about doing this in practice? What am I looking for? Surely there must be numerous ways in which malicious activity could be concealed from the casual observer.
If you are worried about intentional malware, I'll recommend building from source and disabling any automatic updates.
However, if security is really important to you, then you'd probably want something professionally made, that has a history of handling security issues well which, and which comes with a warranty.