/ctcp nick version
^ thats directed at you..... privacy issue.
/whois nick & /dns nick
^ there directed at the irc server.... not private becuase you offered this info to the irc server to connect, if they deem it private between u and them they can block it.
That being said.... I personally dont mind replying with my version of mirc, i just like the choice of if to do it, i think most people are like that, you take something away from people they dont care about either way and you sure quickly find that there pretty upset about it, saying "but u never used it anyway" just doesnt seem to carm them.
He has allowed blocking all ctcp events for those who hate the idea of version replies. Yes, it screws with anything else you want to do that needs a ctcp reply, but that is the choice of the user.
Kalhed also allowed u to selectively block ctcp events to any one nick for any amount of time, which reduces this problem considerably.