The Shy Tory is a well known phenomenon.
I suspect the Shy Leaver will become one too.
The 'racist' accusation is trite, old hat and particularly ignorant online where you have no idea whatsoever about the person you're attempting to stifle.
Where I am, the Leave group is strong and vocal. It's a multi-ethnic, inter-generational group who defy pigeon holing. It includes a chap who's been helping refugees in Macedonia and a retired Admiral.
I'm impressed by the arguments they make and particularly the fact they've managed to do so politely and respectfully and without recourse to tedious knee-jerk slander unlike most of the Remain people I've been lectured by.
There are many, many people I've spoke to who wouldn't dream of being so vulgar and unBritish as to declare their intentions but they are all there ready with full tanks to take the Shy Leavers off to the polls.
I think it will be fascinating!