"Printing" is illegal in some states and not others.
No worries here in AR, but check your state laws.
Other than that, as long as you don't print excessively, most people will not notice; or think cell phone.
Just be aware of exposing when reaching above your head and bending over.
If someone does spot you, and they call the police, you could be charged with brandishing.
Depends on how politically motivated your local DA is.