there’s not a steep learning curve.
there have been RC model aircraft for decades, complete with clubs, and a national organisation that has had involvment in drawing up CAA rules/regulation and law.
there might be a steep learning curve for mere punters that have heard the word “drone” on the news that have sussed that you can now buy cool toys with cameras that are easyish to fly without lots of practice flying conventional controls.
as for blockers.
the cheapest toys are bluetooth, so you have to be within a few metres to block them (and would be pointless cos they’re indestructable)
the cheap slightly bigger toys are all open wifi (easy to pwn, as is well wifi as a whole really, if you know how).
the ‘proper’ ones are all spread spectrum cdma (or somethig like that). your choice of breaking the law and blatting out a huge wodge of 2.4GHz and taking out the entire bluetooth, wifi and ISM band locally, or find at least 255 other mates all with similar ‘drones’ or RC vehicles, and try to totally DDoS the vicinity. (I have seen 100+ fly all within the same field, simultaneously, all attempting to attack a target)