Yeah it's random free, but you should be careful. If there's 5 or more people in the ship the game will start, you'll be kicked out of the ship and probably get a random.
I've always used the PC bank as you can train skills such as fletching etc without the risk of random events, so you can also conduct large trades/botting sprees without the chance of a random killing you.
if your alching at the bank where a ROL, as there is a way using the main botting program to lure out alching bots outside the bank and then its just a matter of time until a random they cant solve such as the plant or swarm comes to demolish them.
Great place for banking and fletching botting just about to get my first 07 - 99 in fletching