A year ago I went to a home show and made the mistake of filling out an information for whereby one might "win" some sort of vacation. All it has brought me is dozens of calls in the last year pertaining to vacation offers. Never, NEVER fill out any of these forms - you cannot stop the calls and they come in from ALL over the place.
I had a call from this number 213 256 0538 trying to sell me on a "FREE VACATION". I explained that I was not interested so the caller promptly ended the conversation by saying "I hope you die and go to hell". We live in a country with the most powerful agencies in the world and yet scum like this can get away with this.