You have greatly misjudged these folks. They're not out to stop you from having fun. They want to make sure that when they come to squash your "rebellion" - understand that your rebellioin will be trying to re-establish constitutional rule in the USA; something that has passed away long ago - they want to make sure you have a very difficult time stopping their armored vehicles.
With today's array of hardware versus what we as civilians can scrape up, we better hope a lot of the military sides with us. The hardware we own is mostly inadequate to give pause to any but the most lightly-armed agencies.