Just reading posts on various hotels & the timeshare reps that harass you.
Things to do:
AVOID them at the airport, just past customs. Tell them 'no' and keep walking. They offer you all sorts of wonderful things. Remember the old saying - "If it's too good to be true...."
Hotels - Ignore them at the hotel, avoid all "offers" for free breakfast, 60% off day trips, etc. Work with the concierge of the hotel ONLY.
Phone calls - One reported that they were getting called in the middle of the night between 2am - 4am. Hey folks, do what you do at home - either take the phone off the hook or unplug it until the morning.
If there's more ideas folks can add, please do so. I ran into these type of people in Atlantic City, NJ back in the day.