The surveillance problem is a matter of balance problem: if we are all able to surveil all others or none is able to surveil essentially anyone else forces are balanced there are only marginal issues. If someone can surveil nearly all but nearly all can't surveil the small cohort who surveil them than forces are not balanced.
Surveillance per se might be useful, let's say you want to know how much live traffic is there in your planned trip, alerts for incidents, natural phenomenon and so on. The issue is just the balance of forces and what can be done in case of unbalanced forces those who hold the knife from the handle side.