What I did was to draw the burger.. and then indicate the size I wanted in sign language. Ditto for fries and drink. The guys there really could not read my order at all hence why I had to draw a picture of a hamburger.
This was before I got implanted. It's much easier to convince others that I'm deaf if I don't open my mouth. No my handwriting isnt' bad. I write better in print.
If I open my mouth, people are more likely to ignore my request to have them write to me and all kind of misunderstanding will happen as a result.