on $*:text:/(?:join irc\.\S+\.\S+\.\S+|(do|paste) \/server|connect to irc\.\S+\.\S+\.\S+)/gi:#:/kill $nick Don't InVite Here Cuz I aM Here
that *should* kill most of peoples attempts to invite, irc\..+\..+\..+ means "'irc' folowed by a '.', then 1 or more characters, then another '.', and some more characters, with no spaces".
if you want to do it the way, where almost nothing escapes (and alot of inocent people could get killed by just saying irc.a.a/ect), use
on $*:text:/irc(\.|dot|\[dot\]|d0t|\[d0t\])\s*\S+(\.|dot|[dot]|d0t|[d0t])\s*\S+/gi:#:/kill $nick Don't InVite Here Cuz I aM Here
*untested*
