So lets take all humans currently alive in the human world. They all have the karma to be reborn in this realm. 

Computers exist in our world, and in some places (Not all) public libraries provide them and access to them / the internet. 

Are there cases where karma would prevent someone from using a computer? 

Like say, if you tried to give to someone that had a lot of karma from stealing in a previous life. Would it be possible? Or would events always unfold that prevent you from giving in some way or another? 


I guess what I am trying to ask is if karma can make events that seem possible conventionally (IE Hand someone a 20$ bill) be impossible in practice.