What do these pictures have in common?

• http://marc.blogs.it/platform/platform.jpg
• http://marc.blogs.it/participation/participation.jpg
• http://marc.blogs.it/mediadudes/mediadudes.jpg
• http://marc.blogs.it/voip/voip.jpg
• http://marc.blogs.it/mobilegeeks/mobilegeeks.jpg
• http://marc.blogs.it/scarred/scarred.jpg

They were all taken by the obstreperous Marc Cantor. They all depict panel discussions from the same conference. Everyone is male. All of the above.

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