Beidomon was a male Aes Sedai, and a research genius, who believed that they were onto something great. The drilling of the Bore itself caused great damage, and Beidomon, Lanfear and others involved were blamed for that. Once it became clear what had actually happened, the opprobrium increased, and Beidomon sought obscurity, finally committing suicide when he was unable to achieve it. Everyone knew his name, and what he had done. He had nowhere to hide. As an aside, for those who think that Lanfear was in some way twisted against her will by being involved in drilling the Bore---I have heard the theory advanced---of all those involved in the project, she was the only major figure to go over to the Shadow. She was ripe for the Shadow's plucking long before the Bore was drilled.