I agree that most who saw it made the "Punisher" connection straight away.
I also am not a fan of skulls on anything except for perhaps landmine warning signs and the Jolly Roger (since I loved the Goonies as a kid).
However, as I mature I've learned that what I might find silly, others may very well find neato. For example, a small, faint/hard-to-see Gadsden snake (sans writing) laser etched behind the rear serrations on a 1911 I would think as interesting enough to be "cool". I'm absolutely certain there are plenty of folks who would find that silly.
If the owner is pleased with it, that's all that matters (until/if he ever plans to sell it).