Block the SWAT van from moving with some rigs. surround the goons, they can threaten with weapons, remind them there are a lot more standing than they have ammo and opening fire invites application of tire irons.
They rely on radio first, cowed obedience second. Refuse to obey, surround them, their peers will hear them on the air as they break and cry for help until the batteries crap out.
They only have the power you give them, strength in numbers