Not literally tackling. They’re not going round peoples houses and knocking them to the ground, but they are “taking aim” at cheaters, as the newswire post states.
“In recent weeks, a small number of Grand Theft Auto Online players sought to exploit the game by generating and distributing game-breaking amounts of in-game cash, disrupting the experience for other players.”
That’s probably why the service is down for maintenance today, and they say that they’ll be issues title updates over the coming months to address these issues. They’re calling the fake money “counterfeit”, bless, and they’ll be removing this as part of the process. Anyone who accidentally received money but did not take part in the cheating will not face any further action.
However, if you knowingly took part in these exploits then you’ll be faced with in-game penalties such as being placed in isolated cheater-only games or being banned altogether. You can also report cheaters through the pause menu.
Rockstar apologise for anyone affected by these issues, and are grateful for the community’s support.