Earlier quoted context omitted.
Sure. The article for Bill Ayers describes him as an "elementary education theorist." That's not what he's notable for.
And the article for John Wilkes Booth describes him as an "American stage actor" even though that's not what he's known for. If you keep reading the article, however, it's almost completely about what he is known for (a statement true for both cases). That's just standard wikipedia formatting.
I find "an American stage actor who assassinated President Abraham Lincoln" to be a ridiculous introduction; it should read "an American assassin who killed President Abraham Lincoln" -- the man's profession is completely irrelevant; he is notable for this one act.
It isn't even consistently applied: Ted Kaczynski is listed as a domestic terrorist, Sirhan Sirhan is "a Palestinian Christian militant," but then Charles Guiteau is a "writer and lawyer."