As Bow said, false reports don't hurt you. Though very frequently I see people that don't realize retaliation with toxicity is not ok, and neither is calling to mass report a player; just make sure you don't do that.
Punishments are dealt in 4 steps in order;
- 10 game chat restriction
- 25 game chat restriction
- 14 day account ban
- Permanent account ban
Only in the most extreme cases such as hate speech and death threats will you skip tiers for chat offenses, but otherwise they come in order one at a time. If you get a chat restriction you'll receive a reform card of your recent offending logs which you can show here so we can tell you what you're doing wrong. You don't really have to worry about getting a permaban out of nowhere unless you are extremely toxic.