Risks of flood due to automated replies put aside, imho there's no use for an IRCop in telling the user who trigered a whois on them about the fact they recieved that snotice (if they do).
As IRCop you may be running a script to create a differend kind of lokal display, alike to this example (unreal ircd, assuming you already do receive that snotice):
on ^*:SNOTICE:*: {
if ($4-8 === did a /whois on you.) { echo -a $2- | haltdef }
}
...you may modify it to send messages - I won't, for many good reasons.