I also have no regrets about voting Leave and would do so again, especially as the EU is plainly going down the route we were anticipating - EU army (as denied by Nick Clegg during the campaign), centralised tax regime, etc.
Regarding 'activist infiltration' of GN, I have to admit that my daughter and I on MN and GN respectively always joke to each other that both sites are infiltrated by Labour Party activists because any opinion not of a lefty liberal slant is pounced on for personal abuse of the poster. Maybe it's not always the case but it certainly is nearly always the case in our opinion, sadly.