Some folks in China think the Shenzhou VII EVA was fake:
http://en.epochtimes.com/n2/china/chinese-space-spacewallk-china-bloggers-5326.html
It appears China is not immune to its own native brand of "Moon Hoax" thinking.
Whenever there's an ISS EVA and I'm at home, I keep the video feed on all the time. I've probably seen close to 100 hours of EVA activity this way. I went back and looked at the most complete video of the EVA I could find on youtube, and it looked very real to me.
I think maybe that some of things people are talking about as looking "fake" are just zero-G phenomena they're not used to seeing. For instance, the so-called "bubbles" are just little bits and pieces of loose stuff from inside the spacecraft that end up floating out, while the "suspicious" steadiness of the image is due to the fact that 1) the cameras are fixed solidly to the spacecraft and 2) the commenters don't realize how much difference there is between the mass of the spacecraft and the mass of the astronauts.