I too am skeptical ala the whole Jesse James situation. Still it will be interesting if they can find a way to do DNA testing.
My reasons for skepticism include that the real Booth likely would have gone overseas and been lionized by supporters rather than gone to Tn and later become a alcoholic house painter.
I also wonder where the claimed Booth was burried and why that body can not be tested too?
There were attempts through the courts within the past 6-10 years, to have Booth's body exhumed for testing, to make sure he was actually buried in the family plot at Green Mount Cemetery in Baltimore. From what I recall, the Judge would not approve the exhumation due to the fact that Booth's body was actually buried beneath at least two other family members, and he would not allow those bodies to be disturbed in order to get to Booth's. I believe there are laws in Baltimore that prevent exhumation if other burials will be affected.
Re: your #25. He was an actor with a LARGE ego. He would not have existed without letting people know who he was, under any circumstance.