Unless they were to get totally outrageous.
Showing an ubernasty us government that could pull of flase flag terror and kind of stuff birchers fear or just some cabals within it? I think safe to say we are already in that territory.
Or you mean having a ridiculous plot or jumping the shark?
The second one. The whole plot is (hopefully) outrageous, so Jumping the shark would just cause a "why did I watch this long" reaction.