Well, substantial stakeholders can sample the blockchain data because they are amply supplied with stake to purchase such a service. Unless you propose censoring the blockchain itself - which I hope you are not - obscuring the source of flags via the front ends will not prevent the actual data from being preserved on the blockchain.
Bernie will take full advantage of free downvotes. We can be confident of this, I expect. I thought I should flag back for a while, to symbolize resistance to bullying, but I don't care. I'm not a symbol of anything. I still do my part to suppress spam and the like where necessary. I don't see enough of it to present much of a drag on my insignificant VP, so don't need free flags for that purpose.
I flag trash. You have received a flag.