Hi,
The worst one for me, is the best one ... taking calls from our folks at work and they give me the address, and this and that and then a zip ... three00hsixfourzero. On the same number ... fer crying out loud ... a zero is not an O and an O is not a zero.
If that's bad, in California we say oneohhone ... not onezeroone! And as a policeman friend once said ... you would be horrible at reading license plates!
There ... education and grammar all in one!