To not reveal yourself is you recognise someone from RL?

[cagedbirdsings]

This is hypothethical question but what is the etiquette if you are on a thread and recognise someone from real life? Should you stay away from the thread? Read but not post? Or make yourself known to the other person? I know a few mumsnetters but not their MN nicknames - surely it's a matter of time before our paths cross?

More of a WWYD I suppose really.
Also in title should read IF not IS

I know one person on here but I wouldn't have known it was her until she posted to me.

I haven't name changed though because I wouldn't put anything I wasn't happy for anyone to hear.

I think I found one friend by the info she gave but said nothing. Although her MN NN was a sentence so I threaded the sentence into my facebook profile to see if she realised and I'm not sure now whether she's name changed.

I know (in virtual real life) a couple of people who know who I am because of what I post but have never seen/met them.

It's a tricky one.

If I wanted to post a delicate subject, then I'd defo name change.

I am careful what I post but I also name-change every so often - not everyone is so careful though are they and I wonder, is it morally wrong to not tell someone they have outed themself - particularly if they are posting on an emotive subject?

I know at least two people know who I am. Not bothered. They are nice people, might hide otherwise.