Banning advertising would have the opposite effect; entrenched players would have a massive moat. The biggest gains from advertising by far accrue to newer entrants, not the big companies.
Everything single one of those local businesses is also doing advertising, and is probably how you found them in the first place. They're buying local newspaper adverts, using flyers, or participating in valpaks/coupon mailers.
Actually all of those sound fine to me... I guess it's really just Internet advertising that feels wrong to me, especially when they try to fill in as the source of revenue themselves rather than a means to drive revenue for the main product.
It's understandable, but it's a position that doesn't consider the large swathe of lower-income households that have access to goods and services subsidized through ads (much of my family). I know it's not a position most of HN seems to be sympathetic with, but for many ad-supported services, including Netflix and Spotify, would be inaccessible without ads. My family can't afford to go out to movies regularly, or spend money out at restaurants, or go on vacation (ever), but they still deserve some leisure time and entertainment and a non-trivial percentage of the market is funded through ads.
The idea that we should eliminate that because a higher-income bracket of consumers is inconvenienced by ads just comes across oddly haughty and privelaged to me.
Heck, I wouldn't have my successful career today if it wasn't for the ad-supported ISP NetZero CD I came stumbled upon in 1999.
Making global business harder and forcing things more local actually sounds like a great benefit.