First, the point is that the only information comes from a student--journalist (who attends the same University mentioned) who interviewed the two teachers feom the same University who spoke to the students who didn't like jail.
Secondly, would it surprise you that everyone in jail has access to a phone?
Pointless vandalism is still pointless, but at least the antiwar protests in the US were by US citizens and were primarily about opposition to US involvement in a conflict US soldiers had no business being in because there were no US assets at stake.
These protesters have unrealistic expectations and goals. Just look at the divesting demands. Due to their age, very few of these college kids understand the reality of where the money they want divested is/going/coming from. Direct investments rarely reflect the full scope of a college's portfolio. Divest from Google, Apple, and Nike then but they won't ditch their smart phones or shoes.
I thought they would have learned about this stuff in college.