The Munroe doctrine on destroying novelty

Us patent attorneys are always a little bit nervous about doing google (or bing) search to see if an idea is novel - have we, on doing the search, disclosed the idea to the company that owns the search engine? This is only a problem in theory and I have no knowledge of such a search causing a problem. But I recently came across a new angle on this via Randall Munroe’s excellent xkcd web comic and now I’m even more scared - if you do a google search for something in a small village, could you inadvertently destroy the novelty of an idea through ‘leaking’ the idea to another user in the village via their browser’s predictive text assuming that because they are geographically close to you they want to search for something similar? Best be safe and use a search engine that doesn’t track you (I’m using DuckDuckGo).