On other projects that I have worked on, the dev data has occasionally been scrubbed so that names and phone numbers and other account details are gibberish.

Eg John Smith 0406 320453 becomes Joh$ $m$th 9999 999999, in which case you lose a lot of value that could be obtained by analyzing the data anyway.

If this prompts someone to write a better tool then I'm happy.

Cheers