Many folks seem to think it is ok to text while I'm taxiing even though it is explicitly prohibited several places in our pubs. And, turning into the blocks some will have their face buried in their phone messages instead of looking out. If I try subtlety and ask 'clear right?' they say 'I already called it clear, maybe you didn't hear me' and keep typing a reply heads down on the phone.
Now, there's an argument to let the F/Os taxy!