can you not walk at the edge??? Either the shop-side or the gutter-side?
I sympathise totally with you and your pushchair ot lameness or oldness or your inability to pass a shop window without pausing to peer in...
But surely you can see other people are in a rush, thus keeping the middle of the pavement clear would make sense????...
It will not hinder your shopping experience walking a few inches to either your left or right.....