Eh...what do you expect? EWR Security peeps chasing people about every second. Same happened to me, obviously.
I arrived at IKEA to take some pics and do some spotting. Moment I got out of my car with my camera, a US Airways A321 comes to land. So, I take out my camera, and start to film. 5 seconds later, a security officer from Port Authority says to me "Please do not film the planes for security purposes" and I was like -_- So I went upstairs in the cafe and filmed some stuff in the dirty glass :P