First:<p>WebAssemly will have a readable text format for view-source functionality: <a href="https:&#x2F;&#x2F;github.com&#x2F;WebAssembly&#x2F;design&#x2F;blob&#x2F;master&#x2F;TextFormat.md" rel="nofollow">https:&#x2F;&#x2F;github.com&#x2F;WebAssembly&#x2F;design&#x2F;blob&#x2F;master&#x2F;TextFormat...</a><p>Second:<p><i>&quot;...so much easier to spy on people and hide all kinds of nastiness in web applications.&quot;</i><p>What kind of spying and nastiness? WebAssembly will not have more access to your data than the JavaScript API. It will have access to the same API as JavaScript. For example if it wants your location it will call the same HTML5 location API and with the same restrictions, with the permission popup. Or setting cookies will also call the same API. And thanks to the built-in developer tools in browsers you can check the outgoing requests to see what is sent and to where.