If someone had a noteworthy 'incident' in person (w an agent, on a flight) it wouldn't be hard to trace it back to the SM account.

Back in his Red Coat days MrWeezer often had interactions w unruly passengers. Once he delivered the bad news to a chronic complainer that his account had been closed, the guy had been warned he was on a short leash. Apparently he was prone to being extremely rude & having loud outbursts w agents, FAs, etc. The final straw happened prior to a flight into ATL, MrWeezer met the plane on arrival. The guy started yelling at him, MrWeezer calmly asked, 'is it true you threw your briefcase at my gate agent in (departure city)?' From his telling that pax was an extreme case of consistently bad behavior.

He estimates he 'bounced' around 200 pax off planes in those days for a variety of reasons, most commonly pax under the influence. But he didn't necessarily document those passengers' records.

I am doing my best to make sure my dossier reflects my upstandingness

A lot of responses are slightly misguided.

Most every single time you interact with consumer service, the reason for as well as resolution is logged. That's why a FF with a petty complaint who calls once or twice per year gets a voucher or miles tossed his way, whereas persons who call frequently eventually get nothing. It's also why I've advocated for more than a decade that "compensation" threads on FT -- which generally seek to determine every single complaint you can make and everything everyone else has gotten -- are stupid.

They seem to do quite poorly at this. I've never asked for compensation, except once for direct reimbursement of reasonable expenses when AF lost my bags for 4 days. I get miles even when I send in compliments using phrases like "best experience I've had on Delta to date". One day I'm going to write in to complain and they're going to drop me like the Rabbi.

The bad news is that they keep a file on complainers. The good news that their IT department designed a program similar to the award calendar for use in compiling the files and identifying those who are serial complainers.

I am of two minds on this. I feel certain that they keep track of frequent complainers; however, the cost of maintaining such a huge volume of records would be enormous.

Consumer service logs every complaint and resolution under your FF number. I'm not guessing.

For those who can claim to be EU persons -- even people who may not be EU citizens/residents -- you can require that DL provide you the customer information it has on you; and DL is required to comply under the law in the relevant jurisdiction(s).

What DL has may or may not be interesting, but not all the information is correct -- that can be amusing too.

Oh, no! What if DL thinks I'm ugly?

Very cool! ^

This is great to know -- how does one claim to be an EU person as a noncitizen/resident?

Exactly what I realized during the "delta profiles about you" thread. They couldn't have my info more incorrect if somebody were trying. However, I do prefer it that way.

I'd just send a letter to DL while in an applicable European jurisdiction and have my response address noted in the letter as being an address in an applicable European jurisdiction where I am able to receive mail.

Subject access is a legal obligation about which (some) DL lawyers know.

I sure wouldn't. 95% of my international travel is in F and there isn't a single excellent F product in Sky Team. I find DL's BE to be tolerable, but nothing outstanding.