Actually you can. You can get out there very fast kicking ass. Most people who PvP use cheap ships so it does'nt hurt so much when you lose one. And a gang of frigates can take down a battleship.
i was watching the videos from the huge battles between the corps they were having, and one was about 8 frigates attacking a battle ship, the fight lasted like 15 minutes with the battleship doing nothing but launching smart bombs and randomly owning the frigates, eventually the frigates won but man it was an awsome video