Folks have varying levels of tolerance for blemishes on their audio equipment, and for some an owner's engraved name may be enough to reduce the value significantly (especially since it isn't *their* name). If you're considering what the next buyer will think when you go to sell the equipment, then don't mark the equipment since it isn't going to have any benefit for the new owner. OTH, if security is your primary motivation for tagging your equipment, then accept the reduction in resale value and/or interest in the equipment as a cost of ownership. Whatever you do, if you've marked the equipment and then want to sell it, make sure you're upfront about the alterations you've made so the buyer can make an informed decision.
However, I have to agree with Slipknot1. If a serial number isn't enough to deter theft, why would an engraved name be any different?
However, I have to agree with Slipknot1. If a serial number isn't enough to deter theft, why would an engraved name be any different?