Bot or human?

[Misja]

I'm a regular player at the 6-max 10/20 and 15/30 limit games at Party. A while ago I noticed that whenever I started to play, one player, a Slovenian whose name I wont mention, was always playing as well. For instance I had been playing for 5 hours in the daytime, went out with friends, came home and checked in to Party, and there he was again, still playing.
Then in the morning when I woke up I checked again, and what do you know, there he was again!

The guy I'm talking about is a strong TAG and is multitabling. I don't think it is physically possible for one person to multitable so many hours a day, day in day out, especially not at the 6-max tables. Actually I'm not even sure if there is any moment in the day that he doesn't play. So either this is a bot or some people sharing the same account.

I wonder now if I should report him to Party? Or should I gather more evidence first? And anyway, if I reported him to Party, would they do anything about it? After all he is generating a huge amount of rake for them.