For every person stupid enough to seek support for a product they don't own, there are another 5 or 6 who aren't that dumb (and will forever remember your company as the one who makes buggy software)
I can understand this if your anti-piracy measures are affecting legitimate users, but if the users complaining were pirates, do you really want them as customers in the first place? They weren't paying for the software, so why do you care if they're happy?
Get hold of portable property. -- Charles Dickens, "Great Expectations"