A couple days ago I found out that I could do "/set %olinecount " to anything I want and I can make it say anything that I want so sometimes I do "/set %olinecount Freekie's" so it would say "[16:03] <@Andrew12> I am on 8 channels, across 1 networks. I have Freekie's olines, 4 ops, 3 halfops, and 1 voices. I have non-abusive power over 182 people" :P
I'm not overly sure of the point in posting this comment. You make it out to be some kind of code exploit. Of course you can modify the contents of variables in your own client since it no protection for these things is given in mIRC that something like Object Orientation would provide.
Phil