When I was 18 and in my first job, my boss and I installed the very first windows NT file servers for a major uk public sector organisation. They were all named after beers that we’d drunk on team nights out. We had Blacksheep, Tanglefoot, Snecklifter, and so on. They were in a test environment so it didn’t matter. Until they went into production…
That was over 30 years ago now, but I still usually resort to beers.
Yes, but to do that they have to be decoded and handled. That’s basically what the commenter above was saying.
The original 6502 had many undocumented opcodes for this reason, and developers stated exploiting them for various reasons. The CMOS 65C02 redefined them to no-op. This has been going on a long time.