What if I found wallet 69, initiated the transaction, and then replaced the transaction myself (by stealing from myself), would it work?
How many times can a transaction be "stolen" before it is mined?
You apparently don't quite understand how RBF and Full-RBF work. As RBF is in the interest of miners/mining pools because it increases the transaction fee, you can safely assume that basically every miner/mining pool has Full-RBF enabled. Therefore you can't prevent RBF even when you flag your transaction as non-RBF.
Didn't you read at least past few pages? Your only chance would be to queue your transaction to be mined non-publicly, e.g. via
https://slipstream.mara.com. I searched this thread and below citation is the first hit of it here (page 51 of this thread, so not too far in the past). I took the liberty to shrink the picture in the quoted snippet a bit.
Thank you. It really works. I tested it by creating a "fragile 69bit" wallet with $50 and made the transfer and the public key was not listed in the mempool.
Now I can continue my code using FPGA. Thank you very much for your kindness.