A: O_o WEIRD question.. Anyways.. It's possible..
To get rid of ONE, TWO or THREE outpost
1.) Move your main yard there then move your main yard again, this will remove your outpost and will be replaced by wild monster tribes. BUT, this will cost you lots of resources and two to three of your outpost will be gone.
2.) Ask your friend or other players to take over your unwanted outpost.
To get rid of ALL your outposts
3.) Ask someone to completely destroy your base and you will be asked if you want to move or stay in that location. Choose move to another location and all your previous outposts will be gone.
4.) Recycle your Map Room.
5.) Ask someone to invite you in their server.
For more information please visit these pages:
Hope I helped you!