(Chiming in as someone who's web site has been "hijacked" and even stolen in its entirety more times than I can remember, which is why I have rather over-done watermarks on most of my images and my single biggest expense in 2007 was legal fees).
Ambiguous "stock" images -- Guys with guitars, gals wearing headphones - It's all good.
Once you get into gear shots, that's just -- That's bad.
Some of the excuses I've heard... "My web designer did it." "It was on Google, so it's public." "Well, our place doesn't look like that but we want people to think we have a nice place."
It's theft, it's misleading, it's misrepresentation, it's copyright infringement, etc., etc., yada, yada and I'm glad you took it down already. Happens all the time, pi$$es me off like few things I can think of (whether it's my site being hijacked or not).
Just ranting. Nice day, y'all.