I agree with you on many aspects, although not Bridge Guy crossing them on the bridge. Strangers don't cross each other on that bridge. If everyone crossed that bridge just one time they would instantly throw away the notion of a U turn.
The height/weight estimates make no sense in conjunction with each other. They have Bridge Guy as borderline obese. In fact some of the combinations do fall into obese, especially if you use the 180-220 range which is often cited.
Probability has to play a role. If he is as short as 5-6 then he can't be as heavy as 200 or 220. That is asinine. If they are going to use a 40 pound range then it should be dropped to 160-200. Actually I think the 160 is still not safe on the low end.
I agree that the height estimate is probably off, the more I look at it and especially if it is hair only. I would bump the low end to 5-8 and go as high as 6-0. Again, that is more representative of American males. Also the 160-200 (or 150-190) weight would be more in line with 5-8 to 6-0 height. I am not seeing an obese person given all that baggy clothing.