> For example 4 may be seen as 9 Except no, specifically because 9 has a slanted ending compared to 4. If some idiot writes the symbols whatever they wants ins

> For example 4 may be seen as 9 Except no, specifically because 9 has a slanted ending compared to 4. If some idiot writes the symbols whatever they wants instead of the reference then it's the the problem of the idiot. And any way, most people would write it properly which means more mail would be processed efficiently and require less human intervention.