You have no obligation, especially as they did not seek permission to attach. Simply detach theirs by any reasonable means and go your merry way. you should just have a discution with your next door neighbor and see why he\she stuck a nail threw your fence
Of course not! You have no right to do anything to a neighbor's yard or garden without their permission.
If you borrow your neighbor's car without their permission you are a thief. So if you borrow your neighbor's Internet connection without their permission you are a thief
You can overlook your neighbors garden. You are not allowed to go in your neighbors garden physically without their permission.
Ask. Using a neighbor's wireless without permission is probably illegal.
No
Ask your neighbors if they care.
No. Unless it is being used for a purpose that affects the neighbor.
If the fence is yours - ie your boundary and on your land then the neighbor has no right to attach anything to it (without your permission).
building department.
The neighbors have little to zero relationships with each other. No one is allowed to travel from their district without permission from the capitol, and the capitol rarely gives permission, for fear of an uprising.
Nope... you can trim the branches that overhang your property - but you cannot fell the tree without permission as it's not on your property.
yes there is. Zynga does not allow you to have more then 300 neighbors.