After a second thought, I'll keep the blocklist free of political instances, even though most I personally disagree with. In terms of any large ones which are grey areas of legality (loli and stuff like that), yeh I'm protecting my own back by blocking them.
That does mean the blocklist is only 1 atm, I'll keep an eye on what other big instances are blocked by other instances and keep the blocklist updated by doing that. Realistically a lot of the ones I would want to block will be so small I wouldn't notice them so that list will be kept fairly thin I imagine. (I'm not gonna be like beehaw or even feddit.de who have fairly large blocklists)
I get the frustration of having stuff blocked which might feel restrictive, so I'll try and keep the blocklist as small as possible but I do still think some should be blocked.