You write information messages to the console that cannot be easily suppressed.
It is more R like to generate objects that can be used to extract the information a user is interested in, and then print() that object. Instead of print()/cat() rather use message()/warning() or if(verbose)cat(..) (or maybe stop()) if you really have to write text to the console. (except for print, summary, interactive functions)
-> R/utils.R