Nah: going back on a somewhat ethical and REMOTELY fair deal made by folks who are even close to equal in power, that's not OK. Also, most of these sites make no requirement that you read and agree to anything; I can open YouTube and watch videos in an incognito tab right now, no EULA/TOS necessary, so how are you to say I am breaking any agreement at all?

Furthermore, these "use the service or not" agreements is like saying "accept a government or leave the country". Being handed an ultimatum saying "agree or you can't participate with your peers culturally, and potentially can't even access other local services such as government announcements", that's basically not a deal as there is no negotiation, that's being informed by greater powers of the pound of flesh they expect to extract.

Yes, yes I know the law says if you don't agree then you should simply not use the Internet, simple as that. That's clearly not even a possibility to be a functioning member of society at this point, but I guess it'll take some time for the law to catch up.