It's none of our business what teachers do when they are done with their work and have left school. Now if they're in the classroom and tweeting their boyfriend while the students take a test, that's a whole other situation that should be restricted. I don't know how you can manage that situation given the complexities of our technology. Nevertheless, the personal lives of teachers and students are off-limits. We do have freedom of speech, and we are free to associate with whomever we chose when we are on our own time. Nefarious activity, restricted by law, is the exception.