There's a similar thread on the El Al forum right now. Not sure about Portuguese aviation law but in most countries that sort of thing is at the Captain's discretion. I have been invited into the cockpit on El Al by the captain who was a friend of a friend. I sat in the jump seat for landing at JFK. I have a friend who's a captain on AA and I'm sure if I ever ended up on one of his flights that I'd be invited up there too.
That said, I'm glad you're not my neighbor as you seem like the type who would call the city to complain if my grass got too long.