Ask HN: Are Foursquare-like tips on the Internet a bad idea?

Foursquare tips are all about niche information that help people make decisions.

It seems like something should exist that allows people to leave and discover tips on the web. Similar to visiting physical places for the first time, visiting a new website can be difficult to navigate--you do not know whats good and bad yet. With tips, you could get the inside perspective right away and find out what is worthwhile.