EG some people running with blocklimits of 4-8mb right now, happily able to accept 1mb blocks but also happily able to accept blocks if the size changes
isn't implementing this right now going to cause bugs for those modified nodes?
for example imagine a malicious node giving them blocks bigger than current 1 MB consensus, like what happened a while back (i forgot which pool it was) with the one bigger than 1 MB block.
won't these modified versions accept that block as a valid one and cause some troubles? like being blacklisted by other nodes since they are broadcasting an invalid block as their inventory?