What do you think of house farmers?

I've got plenty of duplicate houses, but havent really ever properly house farmed. Where I do have them, I have them arranged as streets. These days its as much to fill the spaces as not being bothered to take them down. They will come down as space is needed.

Dont really like having neighbours with big housefarms as it makes the game a tad jerky at times and its difficult to navigate them during events. I have a few neighbours with housefarms and some with the buildings just dumped down. Doesnt bother me, but in the past I have removed housefarmer neighbours when I wanted to tidy up my neighbour lists.