We were 135 miles off their coast? Well no shit, what the hell did you expect?
Imagine if a chinese drone was 100 miles off of Florida, we barrel roll the shit out of that drone. Outrage not found.
Thats right. US surveillance (aka spy) planes like the P-8 in this incident are trawling for electronic data and testing the response from China. Its all part of the game to find out how quickly the Chinese can scramble.