they apparently reply when you request version info, but anyone who writes a addon must add a version reply else you dont get one. I dont reply to that whit any addon i have made, I dont see thats its relavant to tell someone what im (or someone using it) is using as an addon, not that i have written anything that is really annoying to others, but i would have to tell the truth and say that if i did, i would do my best to hide the fact its running, and thats not exactly likely to mean i would reply to a /ctcp nick version