How to prove traffic sources spoof
I do media placement for a website which appears to be spoofing the traffic sources. I can see a few pieces of doubtful codes and recently got a warning from Google Analytics regarding gclid parameter. Of course, before I can raise a flag about it I want to find some proof of it, but I'm no expert. Are they parameters I should look for in the source code to find a proof that traffic sources are being spoofed? Thanka