Yes but it's the scripting forum of the mIRC boards. I'm not sure I've seen Khaled respond to a post in here in 8 years (although to be fair I don't view every one so I can't be sure). Whether he reads any or not I don't know, but asking here means there's a good chance he's simply not going to see it. It has been posted in Feature Suggestions once or twice, at least once in the last year it seems - and typically enough it got out of hand/off-topic as clearly some people feel very strongly about it one way or the other. And frankly I think that's why you probably won't get a direct reply from Khaled on any forum of these boards - from what I've seen he generally tends to avoid confrontational threads (a wise move) which is why I suggested you're better off e-mailing him if you want an answer. Of course Khaled reads the Feature Suggestions forum, so I'm sure he's seen the suggestion before and the fact that he hasn't added the support might be his answer in itself. On the other hand it might be on a todo list.

Personally I've always assumed the reason it was unblockable was on account of the number of repackaged mIRC's you can find that are bundled with scripts that try and pass off the whole thing as their creation, however not so long ago mIRC added the .exe renaming restriction which is a less intrusive means of getting credit where it's due so who knows, maybe suggesting the feature again --either on the boards or via e-mail-- might see different results.

As far as the rest of this thread goes, there's no legal reason why you can't block the version response (EULA or copyright related) so the only reasoning someone might have for not doing it is moral. I don't see any moral reason why you shouldn't block it or even change it if you want, although on the flip-side I don't see any practical reason why you'd want to. To each their own I guess.