Yes, you can. But because you do, Karma will come to you to replace those that you hold. It is important that the person who decides to do the work of Buddha must be able to judge wisely and have good self discipline, because if he decides to spread good Karma, he must be able to withstand the Karma coming back to him. Precisely the point. Some masters are reluctant to participate in the world because they know their actions can cause great Karma.
Some masters become like a mirror to light.
They are not affected by people's actions, thus are not affected by Karma directly. They go through the world like whispers of the wind, but you will notice them because of their mirror like qualities. Some masters take on the world's suffering, and this takes great self-control and discipline. This is why most masters have said they experienced hell and back before reaching their current state. Their values had to withstand the test of time and the Karma of others.