Illegal is what gov determines to put into law against you for their own benefit. Bitcoin itself was deemed illegal in many countries because you know "criminals (could) use it" and other dumb justifications. If gov need a reason to take stuff from you it will find or create one (and kick out your tail light)
But thanks for your explanation. It holds a lot of assumptions though. Luckily bitcoin is a world wide network which saved the network before from governments trying to choke(point 2.0) its functioning and use. And failed.
Your explanation could be directly applied to Nostr as well, wich would make it already "illegal" to have on your phone/computer because of the content other people choose to share at any moment. Now try to stop Nostr because of that. Now try to stop bitcoin by making your node illegal. Your node could already be illegal because now your government deems you to be part of a money transmitter system...
Don't be scared, be a rebel, run a node or two or three, it is not expensive. Nor is the storage. If you still think it is, share a node!
Some people find adding data onto the chain useful. Not all people adding data have bad intentions. Maybe some data might even be a considered useful additional data to be kept on the sacred bitcoin timechain.
If you choose to not see it, doesn't mean it's not there. If you block it, it just means you don't have a full copy of the blockchain.
I do understand your worries though. I just don't respond to created fear the same way.
We'll see how many people get motivated through peer pressure to filter all data from their copy of the chain, if that works at all.
All the best and good luck with BIP-110
