Not to get too pedantic, but you might want to amend that to "9mm handgun" or something similar. Apache helicopter gunships shoot 30mm projectiles!
But to address your argument - a large portion of the gun lobby and gun enthusiasts aren't necessarily uncomfortable with just a handgun for defense, but they are uncomfortable with a technically ignorant government deciding what is sufficient and allowable for that purpose. Similarly, what's to say a precedent established with Megaupload cannot be used to hamstring or shut down Dropbox or similar services? Though you can understand and make the distinction between the intents of the two services, can you trust a judge to properly frame why Megaupload is bad and Dropbox is good? Or for prosecutors, lawyers, and the assembled IP industry to not leverage any legal precedent to shut down what they feel like?
You've got a point but I can honestly say I can trust a judge, prosecutor, or a 5 month old to tell the difference between MegaUpload and Dropbox. What MegaUpload was encouraging was too obvious to even argue about.
That said, you are right. My argument was geared more toward MegaUpload defenders who, for some reason, have deluded themselves into thinking they're defending an innocent service and turning Kim Dotcom into some sort of freedom fighting hero. Your stance on copyright law is irrelevant here because what MegaUpload was all about is illegal in most first world countries. If you think MegaUpload was "just a file storage service" you've got to be lying to yourself.
However, your argument is important because not all cases are so cut and dry. So yeah, in the future it is important to keep an eye on the Feds and make sure the law and due process are upheld because I'll concede that if people are lax (like I am in this case with MegaUpload) then in the future it might be a truly innocent Dropbox that's next. You never know.
But to address your argument - a large portion of the gun lobby and gun enthusiasts aren't necessarily uncomfortable with just a handgun for defense, but they are uncomfortable with a technically ignorant government deciding what is sufficient and allowable for that purpose. Similarly, what's to say a precedent established with Megaupload cannot be used to hamstring or shut down Dropbox or similar services? Though you can understand and make the distinction between the intents of the two services, can you trust a judge to properly frame why Megaupload is bad and Dropbox is good? Or for prosecutors, lawyers, and the assembled IP industry to not leverage any legal precedent to shut down what they feel like?