This honestly epitomizes the attitude of the seaport that keeps me away from it as a lifelong resident of the city. It feels like a playground for the rich and tourists and actually pretty hostile to urban life in various ways.
To offer an alternate viewpoint, I consider the homeless to be pretty hostile to urban life in various ways. I moved out of Back Bay four years ago after living and working there for over two decades. Because home and work were both on Dartmouth St. but on opposite sides of Boylston I had to walk at least twice a day thru Boston's homeless panhandling ground zero: The 7-11 at the corner of Boylston and Dartmouth. On weekends it was usually more frequent due to things like shopping at CVS, taking the orange line, visiting friends in the South End, etc. Needless to say, I got plenty of exposure to the various ways the homeless can be pretty hostile to urban life, whether by themselves (screaming out loud, vomiting on the sidewalk, exposing themselves), interacting with other panhandlers (arguing, fighting to be the next to occupy the primo spot beside the door of the 7-11), interacting with the public (shouting at people, aggressive panhandling) and every so often interacting with me (the majority of the interactions followed standard panhandling protocols, but some were pretty unpleasant and one was somewhat physically violent. Oddly, the one that I remember in most detail was probably the silliest. While crossing ground zero a panhandler asked for a donation. Somehow I had cleaned out my wallet but had a big pile of change in my coat pocket, so I just grabbed the whole thing and gave it to him. I turned around and started to walk away when I heard him yell "Hey!". I turned around and he walks up, stands in front of me, and begins to pick out every penny from the pile and give them back to me. I just stood there for some time while he picked out the pennies thinking to myself "who says beggars can't be choosy?")
Please note that the comment above is not an attack on the homeless or an argument for moving them where they're out of sight and out of mind. They have as much right to be on that street corner as I have. It's just an observation that they're hostile to urban life, same as long, blank, urbanity-killing streetwalls like Tremont on the Common. Both make interacting with the urban environment more of an unpleasant experience than a pleasant one, and for some people that's enough to withdraw from participating in urban life.
I also don't get why people complain that the Seaport is a playground for the rich and tourists. Turning whole cities into playgrounds for the rich and tourists is what the whole Richard Florida, creative class gentrification, glorification of dense urban living, a café/restaurant in every lobby and boutiques/retail in every street corner has been all about. I read an article a while back in which the author calls these cities "Adult Dysneylands" and gives ultra-expensive, child-free but dog-saturated San Francisco as the most perfect example. At least no lower-income neighborhoods were gentrified out of existence in the making of the Seaport.