Broadcasting messages to others while hiding sender
 

I'm familiar with wall, write, and the like, but is there a way to use any of those tools to send a message to a person logged into a machine without showing who the sender is? Wall -n will work, but you have to be root to use that. Is there a way to do it without root access?

This question deserves no answer.

The only possible reason to do this is to annoy other users.