infinite block size limit is not an issue. I honestly cannot understand why he added the 1 MB limit.
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@OP, I agree with your argument. As per game theory and the assumptions you have made, I don't see a reason why the block size limit has to stay at 1 MB.
Newbie question here, is there any way to change the block size limit? How feasible it is to do? Would it require a hard fork?
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By putting a hard limit on block size, you actually increase drastically the effect of spam, as we saw. Once the block is full of spam, transactions are hindered. This is an efficient DDOS of bitcoin. If the blocks are elastic, you can spam a lot, that will increase the size to some point, but transactions can go through unhampered, and you'd have to spam like crazy in order to have an efficient DDOS. Hard limits make DDOSsing of bitcoin in fact much easier.
Use Bitcoin Unlimited (and maybe you should troll more consistently, you were arguing for months about how 1MB would be the blocksize forever. Until it was replaced by the 4MB blockweight, and now you're not Mr. 1MB, you're Mr. Infinite. Riiiiiiiiight)