In concept this is maybe desirable; boot anyone off the internet that isn't able to use it safely.
In reality this is a disaster. The elderly and homeless people are already being left behind massively by a society that believes internet access is something everybody everywhere has. This is somewhat fine when the thing they want to access is twitter (and even then, even with the current state of twitter, who are you to judge who should and should not be on it?), but it becomes a Major Problem™ when the thing they want to access is their bank. Any technological solutions you just thought about for this problem are not sufficient when we're talking about "Can everybody continue to live their lives considering we've kinda thrust the internet on them without them asking"
In reality this is a disaster. The elderly and homeless people are already being left behind massively by a society that believes internet access is something everybody everywhere has. This is somewhat fine when the thing they want to access is twitter (and even then, even with the current state of twitter, who are you to judge who should and should not be on it?), but it becomes a Major Problem™ when the thing they want to access is their bank. Any technological solutions you just thought about for this problem are not sufficient when we're talking about "Can everybody continue to live their lives considering we've kinda thrust the internet on them without them asking"