Ok you're right, there are a lot of inconveniences to this.

By there are advantages too.

I am often contacted for help about a computer or a particular program, and it's often usefull to know some data like that.

For example if someone ask about a specific Winodws feature and I know this feature is not on all version of Windows or different from version to version, then I will need to know what version of Windows is there.

While most people can tell what version of Windows they are using, most of the time they can't tell what CPU it is or how much memory they have.

I realize from your comments that having this information through a CTCP is not a good idea, but I would be happy to see an option in mIRC to send it from a conscient action. Like that I would tell the user to hit for example Ctrl+P and I would get the info I need from the user without the need to tell him how he could get that info for me.