I wouldn't mind, we all have secrets and it's up to us personally to decide with whom and when we share those secrets if we decide we ever want to share them.<br />
Not telling every detail about you life isn't the same as lying, especially when it comes to just online friends: I'd say it's even safer to keep some things to yourself. :-)
I'd be disappointed and they'd be gone.
You never know who is who.
Yes, that would upset me, for sure