It's better than nothing but is it enough to run potentially malicious code? I haven't checked recently but a while ago most distros defaulted to letting anyon

It's better than nothing but is it enough to run potentially malicious code? I haven't checked recently but a while ago most distros defaulted to letting anyone peep into other users' home dirs. Moreover there has been so many exploits over the years letting a user gain root privileges that, for the purpose of security, unix users are akin to a bathroom lock.