Unhinged and deranged are words I'm amazed are used on MN so much, because I have always associated them as being unkind words to describe 'mental disability' - I picture someone like Mr Rochester's wife, who was locked up in an attic, as deranged (for example).
It's like humour, it is so subjective, someone will get offended. It's a minefield - MN is such a big community of people, the likelihood of offense to someone is about 99.9999% - you'd need to sanitise everything to bland expressions like "you must be mistaken" or "you really are a very silly-billy" (or is that pejorative towards people called William)?
People should be free to use whatever words they like IMO
I used to think this, until I once (without deliberately meaning to cause any offense) mentioned the word 'epi-fit'. That's because as children we used to say it, were never corrected and I didn't make a strong association with epilepsy. I can't believe how shitty I felt, having someone tell me their DC suffered from epilepsy. So the penny dropped.
On the other hand .... I'm really offended by people talking about porn on here, it gives me the rage, but I'm told "hide the thread if you don't like it, tough, we're all adults".
So it feels like double standards on here, but it's messages coming from different people, not one homogeneous MN 'person'.