There's quite a bit of heat between the Jailbreaking and non-Jailbreaking community. An unJB iDevice, IMO, lacks pizzaz and luster... leaves you wanting more. While having your device JB allows you to add to and customize your iDevice fully to your hearts desire. Risks? The only risks lie within the user... yourself. Do your homework and be sure that you're performing your JB properly and w/ the propery JB tool. As well, your homework doesn't stop once the JB is complete. Remeber that when you begin installing JB tweaks and packages... some DO NOT work well with each other. It is your job as the JBer to read up on things and determine before hand if things you're loading onto your JB iDevice play nice together.