What are the repercussions if I publicly confront Bill Taggart?
I just replayed through the game again and I now know the exact facts:
If you publicly confront Taggart (or you don't, but you make it all the way to Sandoval without raising anyone to "alarmed"), then when you reach Sandoval, Taggart will be calling him a terrorist on the TV and you will have a social battle in an attempt to talk him out of suicide.
If you don't confront Taggart, and you choose the option to frame Taggart/Sandoval (can't remember which one, because the tape is about Sandoval but Sarif talks to you as if you'd be framing Taggart), then when you reach Sandoval and have been detected along the way (as long as someone goes into alarmed mode, you can still get ghost, but it'll count you as being detected in terms of gameplay events) a cutscene will play and at the end Sandoval will be hostile to you and holding a revolver in your face. Here you can either kill him or subdue him. If you subdue him, the rest of the game (like newspapers etc) is EXACTLY the same as if you'd had the social battle with him.
Not sure what the differences are if you kill him as I was playing a pacifist character and I'm also not sure what would happen if you choose not to frame Taggart/Sandoval, I'll let you guys know on my next playthrough.
I rolled back to an old save to experiment, and successfully made it to his computer undetected (quite easy as long as you don't open the wrong door).
Once there I get the location of Sandoval from a simple level 1 hack and am then given the opportunity to attempt to frame Taggart by placing the incriminating audio recording on his computer.
I have yet to see what happens if I do frame him, as I'm currently alt-tabbed out with the Accept/Decline option presented - will report back later, when I have more information.