Ours are not named with a common identifier and this also needs constant effort to maintain while refactoring and there's still scope for a mistake.

*ideally* devs should not have prod access or their credentials should only have limited access without permissions for destructive actions like drop/truncate etc.

But in reality, there's always that one helpful dba/dev who shares admin credentials for a quick prod fix with someone and then those credentials end up in a wiki somewhere as part of an SOP.