of constitutional law and legal decisions on these cases, and for the most part they have been done erisa good job of separate out the rare cases from cases which is not insightful to violence or violence can be prevented by means other than suppressing speech. i think as a practical matter institutions committed to protecting speech can simply make use of these legal doctrines. it may be there some details which have to be tweaked a little bit for the campus environment, but overall i think where there's a will to protect freedom of speech you can generally find a way while simultaneously preventing violence. i would add further one of the better ways to preventing violence is deterrence. if, in fact, you credibly commit to punishing people who disrupt speakers or otherwise engage in violence you should see less of that sort of activity to begin with and, therefore, your security cost might actually be lower in the way you really prevent it is not so much having lots of our regards all over the place, making clear for example, people engage in violence it that our staff there will be fir