As a private Landlord myself I can confirm all of that. One flat had been rented by several tenants over 10 years with no sign of mould other than behind a fitted wardrobe, new tenant and at first 3 months inspection mould was listed, after 3rd inspection we did a random spot check and found trickle vents and extracter fans taped over, washing hanging over NSH's. Cheeky a******e even tried to claim compensation from us for his damaged property. He was there for 2 years and we had to spend a lot of time and money on repairs when he left. Funny though the 2 tenants since have had no problems with mould.I seldom work in the rented sector, but yeah, I have seen tenants close trickle vents on windows, turn off extractors fans, use clothes horses, never open windows and then blame the landlord when the condensation turns to mould.
Other properties have had similar experiences but to a much lesser extent and took note of advice.