Anyone can place but not destroy boats in the market. Instructions: 1. Have boat 2. Place boat in market 3. Race and have fun until they're are too many boats littered everywhere and it becomes a pain. How many times did you recreate this bug?: Probably in excess of 15 boats were placed. Result: Luxury cruises in the market. Expected Result: No boats in market. Evidence: Go look at the market, you'll probably see boats.
This has already been reported. www.ecocitycraft.com/forum/threads/bug-placing-boats-in-restricted-areas.147649/
I think this actually applies to all towns, I've encountered similar issues in Azerdan (where Mario Kart is located for the most part)
https://www.ecocitycraft.com/forum/threads/bug-placing-boats-in-restricted-areas.147649 The fix is not live yet. Please contact a GameAdmin to get rid of them?
Also, it seems as though it has been attempted to be patched, as oak boats aren't placeable, but all other are.