I'm in favor of the following:
Honesty. Publish what you have.
If you must, lie. Publish an version that "blends" with the prevaling
landscape if you must. Such behaviour is wrong and may lead
to further probes since the reported version and the server behaviour
don;t jibe.
I'm never in favor of "boasts" or "taunts". That is tantamount to asking for
further investigation.
Blocking queries leads to a false sense of security. Someone will figure out
what your running anyway.