Quote:
Anyhow, it is nonsense that this will be a burden in the IRC servers or affect the performance or the IRC client.

- It's not nonsense, you're just not thinking this through. Chatzilla and XChat combined probably account for around 1-2% of users on any IRC network at a given time, the proportion of mIRC users would be around 90-95%. That's a massive difference in how each one's traffic usage affects an IRC server.