At what point do you fight back and say enough is enough?
When they come knockin' at my door demanding my guns. In a more general sense, people have been "fighting" back for the past 20 years give or take. Gun ownership is way up, concealed permits are way up, public opinion of guns has become considerably more positive, and there have been some significant legal cases that have been positive for gun rights. Is there room for improvement? You bet ... and lots.
I belive in the constitution as it was written by our founding fathers.
To me this means no restrictions/regulations on what i can own, where i can buy/sell or where i can go with any arms, within the USA.
Regulation = Infringed
The Founding Fathers were certainly some bright and forward thinking folks and what they came up with in terms of the Constitution is a legacy worth fighting for. However, they could not possibly have envisioned the country's gun issues as they exist today. It sounds to me that if you feel any regulation = infringement then you feel that the Loughner, Cho's, and Holmes of the country should have unfettered access to guns. I would argue that keeping guns out of the hands of mentally unstable folks is worthy of greater regulation.
To address the topic as brought up in the OP, the evidence doesn't support greater gun control measures of recent years but as noted above things have actually improved dramatically over the past decade or two. However, there are some gun folks who must have a vested interest (NRA as an example) in dire predictions of gun control and keeping the pot of paranoia well stirred. This has been the case more in the past few years than at any other time I can remember.