This creates a dilemma for teachers in relation to the provision of good language models within classroom environmental print. It may also be a concern to parents who visit your classroom. Explain to parents why children's approximations of writing behaviours need to be supported. You might also explain that most of the other environmental print in your room provides good language models as does your daily language arts instruction. Other health charts showing ears, teeth, human skeleton, etc.
Teachers can provide some models and make some of the signs early in the year.
When children have the idea, however, their independence should be encouraged.