I'm not saying you should pretend to be a bigger company, but there's a huge gap between pretending to be bigger and more professional than you are and running a scam.
I didn't say scam - but it does come off as dishonest and misleading. If you have a smiling support guy on staff, yeah, by all means, put his photo up on your support page - I appreciate little human gestures like that. But stock photography in its various common internet forms is just laziness.
I wouldn't call it laziness. It is often being frugal. You would be surprised at the number of large companies that use stock photos as well. I think you would also be surprised at the amount of stock photography that you have not idea is stock photography, because the designer either manipulated the image or the chose a good photo for the purpose of the page.
I think we are limiting ourselves here in how stock photography can be used.