Years ago, I had to work on a user manual for the Payroll/Personnel system for a large banking company. We had to include actual screenshots of various functions. These included some very personal information, like full name, birthdate, actual salary, bonuses. etc.
We were instructed to use screenshots showing information of the CEO.
The explanation we were given was that all that info about him was public anyway, listed in the company reports to stockholders. (And he probably already had people to deal with harassing phone calls, and guards to protect him.)
Derek Smalls, and email@example.com, if they ask for an email address, because I reckon that there may well be a D. Smalls at IBM, so it sounds plausible.
When you get one of those US sites that insists on a “ZIP code”, I think many of us enter 90210. They must get tired of that, but it’s the only ZIP code that anybody outside North America knows. I presume it’s the postal code for Beverly Hills.
On online forms, I feel like I’m lying if my name isn’t obviously fake. I’ve used Notmy Realname, as well as firstname.lastname@example.org. I also use 90210 for a fake zip code, and usually try a 555 number for the phone number, although some systems have forced me to actually look up the area and city codes for Beverly hills.
True junk data, I probably use John Doe, or just make up a name on the spot. Thought I must admit the idea of having some standard would be a good idea: maybe ZZZack ZZZuckerman, so it will be at the bottom of the list, and thus easy to delete.