I wouldn't call that banning it 100% if someone needs it.
You can't make askanim that sit on computers all day to look for information because that is only the info part.
There are businesses built on it. And the few that say they can run a business only with a computer during business hours without losing any competitive advantage I'd imagine are far outbumbered by those that can't.
I'm sure many said the same thing 100 years ago about closing their businesses on Shabbos.
I'm not interested and/or willing to get into a whole debate now about the use of internet. My very presence here is pretty solid proof that I use it. But I do believe with a pretty serious conviction that we (the frum community) would be a lot better off with ZERO internet, which is something that many rabbonim saw and tried to effect, but we (community members who decided that our business/convenience was too important and that it's impossible to live today without internet and that we know better than gedolim) have brought the normalization of internet upon ourselves in a way that makes it 100 times harder to get out of. Had we never gotten into it, we wouldn't need each advancement of technology, and we would be happy, perfectly functioning Oivdei Hashem without it.
Perhaps it was never viable, as there were too many skeptics back in the day who didn't envision where internet would lead to, and it's hard to fear the poison without first tasting it. And naturally, when it became the norm for the frum world to rely on internet, it is probably impossible to backtrack now.
Again, this is my strong feeling. If you think it's unfeasible, just replace the word "internet" with "closing store on Shabbos" - which I think is comparable in some ways.
