Just to quickly weigh in: we sort of hate having to have tin limits too, but the alternative--getting cleaned out in minutes--is much worse. We've experimented with various ways to allocate scarce tobaccos, but at the end of the day, the problem is that there are fewer tins to sell than people want to buy for a number of products these days. And that makes people sad.
Sorry,
@BROBS, there's just not a good way to solve this problem without restricting the number of tins per customer per day. I feel your pain though. It sucks. I know (believe me: we know).