Yes.<p>But not for just the reasons given in the link.<p>When your page uses resources hosted outside your control, you are effectively giving a third-party access to your users. This applies equally to fonts, images from image hosting services, videos from youtube, etc, and especially to Javascript code (including analytics).<p>At best, you are trading some bandwidth savings for allowing a third-party to analyze your traffic patterns and users in return - maybe that sounds like a good trade to you.<p>But at worst, your are allowing a third-party (or the people that buy that third-party years from now) to break your site (removing images, etc) at any time, completely outside your control. That is not even considering malicious intent. Google is probably OK right now, but who knows?<p>TL/DR : Host everything yourself