I think the principle of democracy will lose a lot of its meaning if we set a precedent for the re running of referenda and elections. But, notwithstanding that, I think there is a strong case for having another referendum on Brexit. I think a lot of people who voted with their heart would have made a different choice had their head been in possession of the relevant information. It is becoming increasingly clear that leaving the EU is going to create far more problems than it solves.
The opposers of a second referendum obviously don't feel confident that the outcome would go their way.
RE: Can you mail someone if they have their profile hidden?
Well that's why Tulefel suggested you try it, to find out.