My family are from here (around hadrians wall)The women on my mum side, who can be traced back to Skye, remained pagan but chose to attend christian churches so they wouldn't be suspicious and alert the authorities to what they called witchcraft. This wall showed how piss weak the Romans actually were. Didn't really stop anything.About as productive as the Mexican border with the USA or the dog fence in Australia.
No one builds walls quite like communists.They know how to keep the trash out.
Actually the wall was alot larger back in the day and worked exceptional well, the wall was never built to keep people out (in fact that would be against Roman policy which was all about spreading the influence of rome) the wall was designed to stop pictish cattle raiding parties south of the wall (which it did exceedingly well) it is also suggested that it was built to better collect taxes and stop illegal trade.
Finally the walls construction served as a labor camp after suppressing a rebellion by a multinational group of traitors. (most likely slaves or ex soldiers that had been pressed into service)
Additionally the wall was started in 122AD and completed in 128AD infact Rome would not convert to Christianity until around 380AD
(in fact before 313AD you could not be a Christian and a Roman citizens unless you were wealthy, because Roman citizens were required by law to make sacrifices to keep the gods on their side the only way around This was to pay a fine)
the Romans held hadrians wall until 401AD before they pulled out 9 years before the declaration of Christianity being the religion of Roman Britain.
This is important because Romans loved their rules and forced conversions and punishing pagans for being pagan was illegal unless an area was Christian. (pagans in non Christian areas of the empire were even allowed to still have temples and holy places)
Most important the conversion to Christianity actually stopped witch hunts, because early on Christian Rome's official position was that magic and witchcraft did not exist. (although a few churches and priests still persecuted witches based on ancient pagan beliefs of curses and what not this was frowned upon by the church) 383AD outlawed witch hunts by holy order, because witches were considered a myth.
The Christian Rome's position on witches would not change until the 6 century when witch hunts returned in earnest.
Long after the empire had collapsed.