A couple of days ago I got a link to Photoshop Product Manager Bryan O'Neil Hughes's video about some advanced features for removing objects from images.
It made me think of a shoot I did last spring for an agent in Portland that called me after the shoot and didn't like the fact that I didn't move the moveable basketball hoop and tether ball pole that was in the front shot (the stuff flashing on the right photo). He was right, it looked crappy. I should have paid closer attention and dragged both of them to the backyard before I took the shot. But I ended up dazzling him because I said, give me 15 minutes and I'll send you a new front shot without that stuff in it. I used content-aware fill in Photoshop CS6 to remove the hoop and tetherball pole, sent him a new front shot and called him back in 15 minutes. He was very pleased and impressed, no one had ever done that for him before. I was pleased because I didn't have to make a trip back to correct my mistake.
There are many times you need to do this sort of thing so it's important to stay in practice so you can do it quickly when you need to. But there are limits. Over the years we've discussed this subject a bunch. Here is a page where I've summarized most of these past discussions. The agent is ultimately responsible for misrepresentation so make sure the agent is deciding what to modify.