Regarding googling and internet presence, besides the fact that AOs generally don’t have time for this, there is the fact that what they see online may not actually be associated with the student who’s application they are reviewing.
If you google my son’s name and look under “images” the first one you see is a mug shot of a kid that was arrested for vandalism in Ohio. The second image you see is a photo of my son. The vandal is the same age, build, and race as my son, and he has the same hair and eye color. When you see these two images online, side by side, you could easily believe that the vandal and my son are the same person – they look that similar.
If I were an AO and somehow had time to google, I still wouldn’t do it because I wouldn’t be positive that what I saw online was truly related to the kid who’s application I was reviewing. The kid is those “party photos” that pop up in a search may be someone else entirely.