"Report my team please, they are rude :("

Played with a player today who didn't say anything all Champion Select, and once their pick came to be, they were left with the spot of ADC, despite that pick, they went ahead and picked Lux isn't the spot, when our Mid Laner told everyone "If no one wants to play Bot Lane ADC, I'll be happy to do it."

Despite that pick, no one was really upset about it. Lux is pretty capable of sitting back and using her long range abilities to stay out of harms way, so we didn't really mind it. However, her support picked bard, and decided that he was going to roam to assist the rest of the team, while Lux was playing safe bot lane.

After 10 min of our Bard roaming, and getting our Top lane, and mid lane a kill, the Lux gets ganked, because she pushed all the way up to the enemies tower, and tells us that "If Bard isn't back in the lane, she was going to AFK."

We explained why bard was roaming, because she didn't pick a traditional ADC, she picked something very capable of staying safe in a 2v1 lane, so Bard felt he'd be more useful assisting other team mates, while Lux continued to play around her lane. After all of the explaining, she decided to argue that no support should leave their AD carry in lane by it self, we agreed, but we also pointed out Lux isn't an AD carry, so once she realized we weren't going to gang up on the bard, she entered /all chat telling the enemy team we were all Toxic, and needed to be reported. She told the enemy team things like "Our jungler told me to kill my self" or "My support is harassing me" despite none of us actually saying anything like that.

I'm fully aware how the report system works, since we didn't actually do anything, we're not going to get in trouble for it. It doesn't really matter how many people report someone for verbal abuse, if they aren't verbally abusive, there is no punishment. However, after the end of the game, I wanted to report this lux for this kind of behavior, since it is in fact, toxic. However, when it came to reporting her, I really didn't know what section to pick.

She wasn't technically being Verbally Abusive, or using Offensive Language, nor was she intentionally feeding, or assisting the enemy team. She was just slandering her entire team, fabricating a story, attempting to get everyone in trouble.

and there really isn't an option to report anyone for this kind of behavior, so I was wondering Riot, if this kind of behavior is reportable, and under what category would I report it under.

Oh and by the way guys, I'm sorry about the offensive name. My brother caught me when I went to the bathroom, and changed it as a revenge prank, for something I did to him a few months ago. I'm working on getting the IP to change it back to what It was.