You can refuse to accept cookies. For example:
1. in Internet Explorer you can refuse all cookies by clicking "Tools", "Internet Options", "Privacy", and selecting "Block all cookies" using the sliding selector;
2. in Google Chrome you can adjust your cookie permissions by clicking "Options", "Under the hood", Content Settings in the "Privacy" section. Click on the Cookies tab in the Content Settings.
3. in Firefox you can block all cookies by clicking "Tools", "Options", and un-checking "Accept cookies from sites" in the "Privacy" box.
4. in Safari you can block cookies by clicking “Preferences”, selecting the “Privacy” tab and “Block cookies”.
Blocking cookies will certainly affect your internet experience, particularly in the user areas of websites.
Delete cookies
You can delete cookies that are stored on your computer:
1. In Internet Explorer, you must manually delete cookie files;
2. In Google Chrome you can adjust your cookie permissions by clicking "Options", "Under the hood", Content Settings in the "Privacy" section. Click on the Cookies tab in the Content Settings.
3. In Firefox, you can delete cookies by, first ensuring that cookies are to be deleted when you "clear private data" (this setting can be changed by clicking "Tools", "Options" and "Settings" in the "Private Data" box) and then clicking "Clear private data" in the "Tools" menu.
4. In Safari you can delete cookies by clicking “Preferences”, selecting the “Privacy” tab and “Remove All Website Data”.
This will affect your experience on the website and will make you have to go through the registers again and certainly will affect the speed of navigation, not only this but other websites you visit.