Something that surprisingly, almost nobody has said: In order to use somebody's wi-fi, you have to do things that affect the source of the wi-fi. Wi-fi is inhe

Something that surprisingly, almost nobody has said: In order to use somebody's wi-fi, you have to do things that affect the source of the wi-fi. Wi-fi is inherently a two-way thing; wi-fi that only went from your neighbor's house to you but sent nothing back would be useless. It's true that wi-fi also differs from light in that you're using limited bandwidth, but that difference is only even possible because wi-fi is a two-way thing, so it's possible for your actions outside the house to cause loss of the bandwith inside the house. As for employers, overhead is something that you should be taking into consideration as part of the negotiation for wages. If the employer suddenly made you work from home and this increased your costs, this is the equivalent to the employer suddenly reducing your salary. Whether it's fair is just like whether any other reduction in salary is fair. Does the UK have laws about salary reductions?