Using Checkpoints in Bitcoin Core

The first problem was just getting a lot of spam blocks Yes, so that problem was solved by only checking the headers. Now basically a new problem is introduced Namely someone could just send you a boatload of fake headers essentially. While downloading all these headers You also have to store it. This is a resource intensive. So trying to exhaust one of your resources now and then you mentioned this was solved with Checkpoints? Fortunately, well checkpoints have not been added since 2013 because they are you know Not very not very nice way to do it just to be very clear.