She didn't run off with the other team's gnome, she was asked to hold it, then the other person ran off, and she left it on the ground rather than try to seek her out to return it.
To be fair to Caite and Brent when they U-turned 'Team Lesbian' (Carol and Brandie), it seemed more personal than it was about their sexual preference.
To me, Survivor and Big Brother are supposed to be about social dynamics, and Amazing Race is supposed to be about outcompeting other teams (And taxi luck). I don't like the fire in Survivor because it makes it more like Amazing Race, and I don't like the U-Turn in Amazing Race because it makes the show more like Survivor. It's just not what the show is about. Whereas the head to heads, at the very least, are a competition.
In a race, people should not be eliminated for personal reasons, they should be eliminated for one reason only, they failed to complete well.
The U turns have two functions. They can either be the race's blue shell, the thing that punishes you for being too good, or they can be a personal vindictive attack. Neither make good TV.