All this trad v wfp is strange. To me trad is chamois & scrim. To people here it's squegee & washing up liquid. If I had a customer that told me how I should work - as people are suggesting on this forum, I'd just drop them. If you were a taxi driver would you let the customer tell you how to drive?
if a taxi driver was using his mobile with me in,i would tell him
If a trad wc came in through an open bedroom window and had a snooze on my bed I'd have a word too.