You really think a 3 lb plastic drone can take down an f-18?
Yes, I do.
First of all, the 3 lb plastic drone has many metal parts, including a big battery. Anybody who has done a FOD* walk on an airfield will know what I'm talking about.
I think it's possible. Doesn't mean I think it's probable, but until Pratt & Whitney or GE or Rolls Royce launch a few drones through jet intakes, we're just guessing, aren't we?
*Foreign Object Damage