Most farmers dont stop until cease fire is paid. The ones who are serious about it will go for months.
but really op, if your friend isn’t getting their tuts stripped, tell them to hide their money that way. if they are, buy pimd banks or find another way to hide it. pvp is a part of the game, so you have to either take the hits and deal with it or hit back and deal with it. ? if they just ignore it, it’ll probably stop pretty soon.