Today was the first real play time I've had with gta online. And I'm not sure what's going on really soooo many jobs keep poppin up, people with trainers made me kill everyone in the server, then bags of money started to fall and I had a mob of swat spawn and start hitting me with tazers. Lol what is this madness? I've never played a gta online so I'm sorta confused on what to do at the moment as far as all the jobs go. Any advice would be appreciated. 

I think the best of advice is to stay away from GTA Online unless you play with friends. 

I have never run into a public server with modders/hackers in it, but I normally just play in a private session unless with friends. From story mode: Esc > Online > Play GTA Online > Invite Only Session.

Ahh I didn't know you could play in a  private server, thanks for that. My friends that play gta have been playing on Xbox and ps4, been trying to convert a few with no luck so far lol. But yeah I've come across a few people playing with trainers in god mode rolling in tanks, planes, and choppers just loving it up so the private thing may be my best bet to save frustrations lol.