I have seen it and it could be another way some people will abuse the platform like parley.io where in some people would link to an old post they had two-three months ago that was utter crap (I know that quality is subjective)

Nobody cared for the content 3 months ago and nobody cared for it now except getting a few krytonia auto votes in .

I took the time to talk to the person because he was in one of my communities and was told to bugger off well then I knew then why he was not getting any votes from me.

And I just checked his account now and there you have it using dlike on articles he saw in facebook and rehashing his old articles again now using it instead of parley.