If you think about it, any society which can harness and manipulate the power of the sun will have tools at their disposal to harness energy. If one unruly person decides to use "their share of the power for destruction," they will have to figure out how to do damage with their portion. Mere terawatts isn't enough.
A society that can harness the power of the sun is going to have some waste energy. Consider: if society uses their energy 99.999% effectively (which is an extraordinary feat, given we're topping out around 25% efficient at our best), your share of the power is still 10-million fold less than the waste energy coming off of the rest of society. A society which cannot handle that raw power will simply not progress to the point where you have that much energy available to yourself.
Now what is more interesting is when they want to use that energy with fine-tuned control. A well controlled fine-tuned weapon tuned to a weakness is far more dangerous than a wideband uncontrolled one. Think of the strobes used by SWAT teams. The actual energy is piddly. It'd be hard to fry an ant with it. But strobed at the right frequency, it disorients the perpetrator and lets the SWAT team take them down. Rather than using a solar-furnace flash light to melt the opponent, they found a weak direction and struck with high precision.
Of course, the only limit to this is the ingenuity of a human. This is an arms race that has been going on for thousands of years (billions, if you believe in Evolution). Nothing changes except the scale. You're still going to see individuals choosing to try to attack weak-points, and individuals trying to shore those weak-points up.
So how did you get to this point of trillions of gods? It's not like you dumped a trillion teenagers on a planet surface and gave them each part of a sun as part of some TV teen drama. Along the way, you're going to have developed an entire sun's worth of safeguards and protection devices. What they look like is up to you.
I'd say the sky is the limit, but when you have the power of the sun, you have to set your eyes a bit higher than that.