Using Text with RFID

One of my idea developments on using RFID:

Using text to display words where people can make sentences in public using their RFID tags. It would be similar to Magnetic Poetry. Certain values could be assigned to certain letters. It would be like creating messages on city walls, that people can pass to one another.

The playability of words and what would draw people towards it and what would make it more exciting would be areas worth doing research on. Is it fun? Is it the best way to go about it?