Can of Worms

Sometimes when planning or discussing a project, someone may make a complicated suggestion, or have an idea that introduces many difficult problems.  "We don't want to open a can of worms," would be an appropriate response.

Opening a can of worms is a common idiom, similar to saying, "there will be too many factors to sort out in order to solve this problem.  It's not worth the effort to do it."

Imagine opening a can of worms and staring into it.  You cannot distinguish the start of one worm from its other end!  It's just a confusing jumble. 

Today's entrepreneurs look at a seemingly impossible problem, such as organizing a can of worms, and use the power of computers and software algorithms to sort out and solve difficult problems.  They might say, "Ah, it's only a can of worms!  What's so bad about that?"