This claim cannot be proven as a fact at all, and has many instances that prove this is based more from an opinion than anything else. Firstly, the title is worded in a confusing manner, using the word "should" as if it is a shared opinion that the this should take place. It feels as if you are forcing us to think in the way that you do due to this commanding tone of wording. Furthermore, police provide an essential presence on schools and campuses alike, with the unfortunate day and age we are in the the violence a single individual can cause. Lastly, the stat used of the 2,500 students that were arrested only is a number without a description of why they were taken into custody, which could have a very reasonable answer for doing so.