oh, I've thought of one I told to piss off!
an ex colleage of mine was buying a flat, in 2007, so was offered 125% mortgage to clear her credit card debts at the same time (this bit will be important later).
She was convinced she'd be able to move in in 4 weeks - we all told her buying a house was sometimes delayed etc, but she was determined the estate agent had said it was "possible" so she gave notice on her flat for this. Then obviously, there was a delay and it was going to be another 5-6 weeks after she was supposed to be out of her rented flat. She asked me, someone she barely knew if she could come stay at my flat (she'd met DH once for a brief chat at a works drinks). I said I thought it would be tricky for us, and had she asked her landlord if he could extend her tenancy for a few weeks if he'd not found a replacement tenant. Then she told me that she'd ordered new wardrobes on the back of the fact that she'd have this 6 weeks of paying no rent or mortgage staying with a friend. That sealed it for me as I thought 'how stupid'. (Plus I did think if she was asking me she must have run out of close people she could take the piss with).
in the end, another colleague ended up having her to stay as other colleague was going to New York for the same 6 weeks and had a dog, suggested cheeky colleague stayed in her one bedroomed flat and looked after her dog, saving her kennel fees. Except for other reasons, cheeky colleague's flat purchase was delayed even further, and she stayed with dog owning colleague for another 2 months after she got back - sleeping on the sofa, taking over the whole living room.
Cheeky colleague admitted to another mutual friend colleague that she'd deliberately not rushed it through and was stalling the sale as she was enjoying buying things for her new flat with the money she would have spent on either rent or mortgage and bills if she wasn't staying with dog owning colleague. Things that dog owning colleague had to have cluttering up her flat for those months - while dog owning colleague bought all the food they ate, and paid all the bills. And then in the end, dog owning colleague was so glad to be getting rid of her, dog owning colleague ended up paying for the van to shift all cheeky colleagues stuff. She had to do that, because cheeky colleague had treated clearing her credit cards as meaning she could run them back up again and by the time she was looking to move, didn't have enough left before her credit card limits to pay for the van hire...
I would hear the regular updates thinking "dodged a bullet there" and "bet dog owning colleague wishes she had just sucked up the cost of the kennels"