Some of you may remember that even with the cost of buying a supporting membership to the 2015 Worldcon, a rather large number of people decided to crash in and push a slate of candidates onto the Hugo Award ballot so amazingly unpopular that the rest of the membership voted five categories as "No Award," doubling the total number of such events over the entire history of the Award.
I'm sure that there being no barriers of any sort and no cost will work just fine, won't it? There won't be thousands, if not tens or even hundreds of thousands of bad actors jumping in just for laughs, will there? And it will all cost nothing at all, because there's always Someone Else who pays for everything, isn't there?