I'm not a big proponent of this idea. Allowing cameras to be more seriously harmed by specialized gear (an EMP) would be nice, but graffiti/cleaning for cameras is something of a staple way for characters to start their career. It gives the potential for people to get their feet wet in something greater than them and allows the opportunity for those with large networks to delegate small tasks for small chyen.
Sure, one could argue that the "small task for small chyen" could then be dropping EMPs at cameras rather than spraying them down, but without getting too into IC detail? Under the idea posed, the stakes would be significantly higher for all involved.
I don't have a real understanding of how much bloat one added item might cause, but maybe the solution would be a more moderately priced and specialized piece of tech designed for X number of attempts at offlining or damaging in the way that you've suggested. Similar to another system we have now.
Interfacing with the world and fighting back against established infrastructure is great. I would just hate to see common immy jobs disappear and, with them, value and demand behind items used for them.