Who called from 4163604084

This is apparently an outcall number from 'Skype-Out' subscribers.  

For some reason when you call into this number, you receive a recording stating that the number is  "Not in use....  ....Thank you for using AllStream" .

416-360-1176
appears to be a skype ph # that did not respond. Shortly thereafter another call from "unkown #". Calling party said they tried earlier (few minutes) and no answer.  
Had this once before with similiar circumstances

When i called back, it was automated response :"The number you have dialed is not assigned. Please check the number and try again." Strange...

Call received, and after a long pause "congratulations! you have won an all expenses paid blah-blah-blah-blah.."

On call back, number is not in service.

Why do they do this and waste our time??  Does anybody actually fall for these things anymore?

got calls from 4163604084 and 4163503642 that u hav won tour and blah....blah...on cal back This No. is NOT ASSIGNED. where we can report abt these