So by Hillary's reckoning maybe 1 debate is too many. Maybe Trump will say something offensive and she will refuse to appear with him. Her supporters will say the same thing as Trump supporters said when he didn't show. "Good for him/her!"
Can you think of one campaign where there were 12 — count them, TWELVE debates — just for the primaries/caucuses. ONLY because the RNC and networks were getting $ out of it were there that many. And the only reason they sustained the size audiences they did was because of Trump. After one or two, there would have been no audience without trump. Throughout those TWELVE debates, o one was educated, no positions clarified. Just a big waste of time.
In the presidential race there are only three debates, usually 2 presidential, 1 vice presidential. I think Hillary could handle that. She would have to handle it. There would be no backing out no matter how “offended” she might claim to be (as she did with Rick Lazio if you remember).