If a person knows people in the 305 area code, or is expecting a call from there, I would agree with you, but for others, answering an unknown call from there (or from anywhere else for that matter) is not a good practice nowdays. The 305 area code has an unusually high percentage of reported scam calls.
There is a large telemarketing company there now that is bothering a lot of people - I filed a police report for over 220 calls in less than a month - as many as 13-15 in a 3 hour period some days. I did the *57 call trace service, logged them, and gave them to AT&T who researched the actual number it came from, then the police paid them a visit.