Well anybody who is not aware that there are capacity sizes in relation to batteries for whatever their purpose is clearly been living under a rock!
Cruiser Elite as well as myself (along with others) are frequent travelers to China - where in China for all of the past 7 years I have been traveling to and from and who knows how long before that - X-ray all checked bags for batteries at check in.
If batteries are thought to be in your bags, you are sent to an inspection room to assist in having the security official inspect your bag until they are happy and in most cases will remove the battery and hand it to you as it is a no-no in checked baggage.
Aerosols are also picked up and inspected, always my shaving cream can, but yet to not have that accepted as ok after confirming it is shaving cream and not deodorant which that is a no-no.
Boarding passes are only issues upon checked bags passing inspection - which makes the check in process in China three times longer than anywhere else in the world I have been.
I too feel one must be under a rock not to know about the substantial risks of lithium batteries. But a lot of that comes from my experiences in China around checking in for any domestic or international flight and having laptop batteries, spare cell phones, and even electric shavers taken out of my bags and given back to me to carry on.
The icing on the cake on it being intrenched in my memory is around lithium batteries has been the multiple incidents in regards to them. For starters, one intrenched in all our minds is MH370 - which it had around 300kg of them as manifested cargo - and remains one of the main theories on MH370 which it has since day one.
Then UPS6 in 2010 with OZ991 in 2011 that then prompted tighter rules in air travel and batteries in the hold world wide and the endless stories about shortages of Apple Products starting with the IPhone 4S because Apple couldn't find enough cargo capacity to deliver their phones around the world as anyone commercially flying planes were either banning flying them or restricting their volume with OZ991 being the final straw as to say that prompted them all to move rapidly.
Since 2011, if you listened or not, everyone who flys, has been asked if they have any lithium batteries in their checked bags along with the rest of the list like explosives, bombs etc that most just say no to - without knowing that RC drone or spare laptop battery you threw into your checked bag was as good as a bomb.
The stories and articles have been out there, that all of you have no doubt read - it is just for most they skip over the point about lithium batteries and the risks they pose and the dozen or so aircraft total hull losses that they have caused over the past 10 years from them.