Change wp table prefix is needed to protect our blogs from any crimes. The prefix for WordPress table is wp_, this situation often use by hacker or cracker or someone to inject any scripts for taking over our blogs by steal the security info.

To prevent that case we should do anythings as a preventing. Now, we must rename or change the wp table prefix with other one. To raname the table prefix it can be done from phpMyAdmin, or use any plugin to change wp_ to other.