[lawlessone]

Yeah , people take stones to clear land for farming or to build walls to enclose their farms.

Can't be too mad about it though, the wall was probably relatively new to them

[scott_w]

Also historical preservation was less important to the people at the time when life was, frankly, much harder than it is today. Most well preserved buildings today are the ones that were useful to keep around - for their original or for a new purpose.

[lawlessone]

Roman ruins in post roman Britain must have looked almost magical.