Quite a few of us who voted in 1975 thought we were voting for a Common Market, which seemed an eminently sensible idea. What we got (though we weren't told about it) was the European Union. The signs were there in hindsight but we didn't have the internet in those days so couldn't really know. And those few who warned that it was the first step in the creation of a European super-state were ridiculed. Now we're saying "We didn't vote for that at the time" which is the main reason why us older people are voting to leave. In a nutshell, we were conned. You could even say we were groomed, with all sorts of promises and treats.
The Lisbon and Maastricht treaties were the next steps and there was some disquiet but we didn't have the chance to vote on those. Voting t stay in on Thursday removes one of the last major barriers to the implementation of the Five Presidents' plan for fiscal, monetary and political union. That's in the public domain because of the internet though no one on the Leave campaign has brought it up when they really should have. There is simply no prospect that we will be able to opt out of that, which will involve joining the Euro and surrendering fiscal policy to the EU Finance Ministry. There is currently no guarantee, despite what Cameron will have you believe, that the NHS will be protected under TTIP. Does anyone really believe that Hunt even wants to protect it?
If that's fine with you, then vote Remain by all means. But do it with your eyes wide open and don't come back in 15 years time saying "But I didn't vote for that in 2016".