Answer me this...
Could theoretically a person (any age) download a script like noname or invision and have xdcc script built in? Could they then use these cool dialogs and add their own personal family pictures, videos, etc because its just convenient and already there? Just because you see sites like pakcetnews posting illegal files with xdcc doesn't mean there aren't legitimate uses. Unless you have visted every irc and every channel, and whitnessed every use to be illegal, you can't tell me what it is not.
Good day.