Actually, based in the stats I've seen in the past (I can go hunting for them if needed), you would be crazy to download "anything at all" from the Play store, in the sense that the probability of a randomly-selected app harboring malware or privacy-invading practices is much higher than in the Apple App Store. But this is also like saying that you'd be insane to follow a random URL from your inbox; any random link is probably a phishing site or spam Viagra store, but you are unlikely to select one of those URLs by intent. Likewise, the vast majority of dangerous Android apps aren't ever going to appear on your radar, but that doesn't mean they aren't out there, just that they're poorly-targeted. (The Windows store, by contrast, was at one point full of questionable apps impersonating major brands, which is a much more obvious threat model.)