... but even "name" sites can do that: how do you know that someone is the name that they have given? You don't even know for sure if they are male or female - or anything about them bar what they choose to tell you.
You will find if you stick around (and respect other people's different view points) that you do get to recognise different people, so you do get a feel for what is a wind up and what isn't.
And no, you can't always tell if someone is lying - but on the thread where you accused someone of it, she very definitely wasn't lying.
This is a discussion board - and that is what we do: there are different opnions, sometimes we diagree and sometimes we agree. But most of all, we try to offer support.
A reminder about the Mumsnet Philosophy:
"A word about our philosophy
The idea of mumsnet is that by pooling knowledge and experience, parents make the job of parenting easier. Please bear in mind that issues to do with raising children can be very sensitive and that everyone has the right to make their own choices when it comes to bringing up their kids. This is a discussion forum and we ask you to respect other people's right to their opinions, even if you disagree with them. Our policy is to keep intervention to a minimum and let the conversation flow. Having said that we will remove postings that are obscene, racist, or contain personal attacks.
Whilst we allow unlimited nickname changes to preserve anonymity we don?t allow name changing for malicious or inflammatory purposes. Members who change nickname for these purposes may be asked to leave. "