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That's quite true, there are various laws set out by the CAA and suspect other aviation authorities impose similar regulations in the Americas, they certainly do in the US; however...

If you own a drone that is under 250g, you have a fair amount of freedom

I guess that would be similar to the EU regulations - not having a drone myself, I have no insight.

250g is just a toy, ain't it? Anything with a decent camera is heavier.

I would argue that some under 250g are not toys and some are. Anything that is above 240 such as the DJI Mini, certainly isn’t a toy as the cameras on them are actually really good.

Then of course you get the industrial quads or octocopters which way many kilograms and they certainly do need a license and a lot of training.

I used to have a heavier drone but now only have the Mini.

Well, these were just my two cents, I am no expert in the field :) 250g is basically my iPhone with a case, so I could hardly imagine a reliable drone with an engine, batery and camera(s) and everything it needs under this limit.