Irony, or just a waste of money?

I've always struggled with the definition of irony.  I know Alanis Morissette got it all wrong in her song, but I still struggle with what is right.

So, my question for the day is, does this picture demonstrate irony?

Do I really need to pay for ADT when I have this laying at my front door?

Zuzu says it's not irony, it's just a waste of money.  She says she's got us covered in the security arena.