This is pretty simple to bypass, e.g. type this in the url:
javascript:d=document.createElement("div");d.innerHTML="<style>span:nth-child(odd) {display:none;}</style>";document.body.appendChild(d);
javascript:d=document.createElement("div");d.innerHTML="<style>span:nth-child(odd) {display:none;}</style>";document.body.appendChild(d);
In any case, there's always the impossible-to-defend-against attack: just hit PrintScreen on the keyboard, paste to MS-Paint and run the image through one of the many OCR websites that you can find via Google. Maybe even run it through MS-Word's autocorrect after that.