People making multiple accounts on LMG and affecting puzzle ratings

[Realshaggy]

There are some more accounts that are suspicious with the same effect. I saw this some days ago already. There are a lot of puzzles that get solved by one person and then all of the sudden 5-8 people solve it too within an hour. My first thoughts were, that somebody is sharing solution codes somewhere and not a real multi-account, because that makes more sense from the time frame the solutions are logged in. But of course that is pure speculation.