No judgement here. The LF side of my xMagic currently reads as my dog’s pet ID tag.
I used a Flipper zero to copy it across. If you buy a Flipper I recommend buying a genuine new one from the Flipper site or LAB401 as there are many scammers out there looking to steal your money.
Keep in mind that you would then read as a clone of an actual pet. Changing it to an ID number of your choice would probably require a Proxmark3 which you can get in the Dangerous Things store (again, this is the safest place to buy) and depending on the chip you choose you may be able to get a bundle deal.