If you write a scrap with a URL in it, Orkut requires you to complete the image verification (CAPTCHA), however if you post any URL within the Google network you are not required to do so, this flaw can be used to post url's bypassing the image verification.
For this trick to work simply use the format below:
The flaw is being successfully exploited by spammers and Orkut virus makers for mass scrapping users with live links bypassing the whole SPAM protection mechanism of image verification.
Most work places and educational institutions block access to social-networking websites by means of firewalls and content filters but there exist very easy tricks to bypass these filters and access restricted sites at work, school and colleges, you can easily unblock websites like Orkut, MySpace, Bebo, Facebook and Friendster to name a few.
There exist many proxy sites to access blocked websites here are few good fast ones for you: