I for one have never shouted abuse at her , indeed never talk to her , just give her stern looks.
You mention Big Issue working not begging. Is this person legally allowed to work in UK. I have no idea of the answer but for instance if she comes from Bulgaria or Romania the answer would be no.
Who defines a legal spot for these workers / beggars. Surely pavement belongs to The Council. Do I need to complain to them or Sainsbury.
Surely Sainsbury who sell reading matter and pay rates etc should not welcome competition which does not pay any of these.