
I am GUILTY!!! I use the harness for my son (he is 2) when we are standing in line. It keeps everyone happy. 1) He can't run off, but he can still move between my DH & myself, but not invade others space while we wait. 2) We are not constantly calling him to come back. (I hate having to listen to that) It gives him a boundary.
I also have been known to be an "Aggresive" stroller queen.

Only when it is warranted. That brings me to my pet peeve
When going thru doorways, walkways, or just a big crowd etc. People who come from behind you, see the stroller, see the kid in the stroller, BUT STILL insist that they should go first. Pushing their way around & on thru. Not caring that their bags, backpacks, bodyparts or whatever are bashing my kid in the face.

Then you just might get your heels nipped. Please don't flame me for that last part.