I did once. I was young and broke and I saw another apartment in my same building on craigslist for less than I was paying. Tried to call my landlord (who was one guy and not a giant Corp) but he wouldn't return my calls. So I sent a check for 50 bucks less via certified mail - he called me the moment it arrived and let me get away with it. That apartment was 550 and a drop to 500 made a difference for me then. Now... That same shitty apartment probably rents for 2k a month.
I think the exception proves the rule though so I won't make you eat any paint chips.
My vote too. It's crazy, nothing can be trusted when it relies on ads. Everyone likes to think it doesn't work on them or is worth the free content but they are wrong and it isn't.