This is a minor thing but it is very annoying to me when people replace every instance of “th” with þ, while ignoring the existence of ð. Like those indicate very different sounds I’m sorry you are not really saying “þat, þis, þose” unless you are hosing me down with saliva
Now, writing like ðis might be confusing, but at ðe very least ðis actually follows what English sounds like. I only ask for consistency. “ðis þeremin.” “ðat þursday.” “ðis is ðe þanks I get?”