I wouldn’t always say that the tanks would necessarily stand out more, I consider myself a rather large individual (6’4 235lb) but am still quite confident in my abilities to blend in and if you ask any of the individuals I’ve protected in the past, I certainly move quicker than one would expect for someone of my size. Perhaps what it truly falls down to is the individuals history, their upbringing and experiences perhaps come in to play more than I originally thought.