The thing is, that one negative does not mean that they have changed. I used to think so: the "plenty of fish" rule said that I might as well drop any with a negative and choose one without any negatives. It may not be fair, but so what? While a first time poster might be simply delusional or has a bad case of EAS, why risk it? This is about all of us punters reducing risk.
But, in E Mids, there are no longer plenty of fish. If I book Amber (and pay in advance by direct transfer) she may keep it. Vicki talks too much. Brook89 is unreliable and has a routine. Mandy gets tired sometimes. Woofie is hard to book. Lucie needs a new place. Pippa is size 12. And so on. OMG there is no such thing as a perfect girl.
So one negative means nothing more than one negative. Read the opinion. Reflect on what it means for your next punt. What are you gonna do, call VIP or Feline? For me, all I mention above stay on my hot list.