Just keep walking when you pass thru' arrivals! A polite "no thank you" until you see your official holiday rep.
When we went in 2007 we were approached by a guy who "claimed" to be working for our Holiday Co.(He asked us who we were with and then said "Oh yes, First Choice")We ignored him and were later told that he would have dragged us off to another desk where they would have tried to sign us up for a timeshare tour!Also be careful with the porters offering to carry suitcases -some of them will route you via a time share tout!! Once out of arrivals tho' we never saw another tout for the whole two weeks!