Obligatory "not today" disclaimer: actually fucked up over two decades ago, but found out today.
At the dawn of theinternet, I made an account on imgur. I figured (correctly) that I wasn't going to use it often enough for the username to matter much, so I just went with the first part of my email adress and a number four times.
Turns out that there is such a thing as nazi number code and it's never a good idea to use an even number of 8s for usernames when you're not a nazi.
TL;DR: Didn't know about nazi code, accidentally selected an imgur username ending with the equivalent of a double Hitler salute
I did the exact same thing. I've been using the name for decades and recently found out about this. My initial reaction was, "Fuck them. I've had this username for years and I'm not gong to change it just for them." Unfortunately, while I know that it isn't related to them, no one else does. It sucks that they get to take possession of it like that but I prefer the inconvenience of changing usernames over the mistaken association with that shit, so I changed the ones I could and abandoned the ones I couldn't.
My randomly assigned 4 digit discriminator on Discord back when I joined was "1488". Didn't know it was a Nazi calling card until one of the members in the community I was participating in tried to get me banned over it.
Fortunately it only took a month or so with Discord support to get them to change it. I contemplated buying nitro so people wouldn't think I was a nazi lol.
United States federal ambulance regulations got the unfortunate designation of "KKK" (edition *a, b, c, d etc). So now when I search for information for both compliance and product purchasing I have to figure out a way to enter things into a search engine that won't get them blocked at work or get me on a list I don't want to be on. Recently the term triple k has been usable but a lot of products still start with the three letters and then their model number, worse yet many have a space between the three letters and the number.
I go by Klear these days, but originally picked King Klear as a nick, since I liked Shakespeare and Serious Sam. Obviously.
Anyway, there's someone out there taking my name on certain sites, so I use KKlear as a backup. I'm always joking that I don't know what I'd do if KKlear was taken as well...
my brother's email ends in '88' because it's his fav number. he likes it because it looks like two sideways infinity symbols. he's had his email too long and it used it for too many accounts to (easily) switch to a new one. so you're not the only one lol
I wouldn't worry about it. Only those most obsessed with hitler would care or notce. Hell, drinking milk now is white supremacy, and I like having strong bones.