Does Riot have any official comments about report weight?

I had an odd experience the other day. I played a bots game to kick back and take a break, yet wound up needing to somewhat carry the game, because... I'm pretty sure all four of my teammates were, themselves, bots. I don't have any hard proof and I'm hardly familiar with scripted behaviors, but none of them talked (except for two that called lanes and then silently went to a different lane), all of them died several times for silly reasons, and their use of skills seemed, for lack of a better word, mechanical. I said everything ranging from "good morning!" to "How is everybody?" to "silent bunch, aren't we?" to "I'm pretty sure you're all bots. Somebody say something to indicate otherwise.", yet no response from any of them. So, I reported all of them for illegal program use afterwards.

Given that I have no hard evidence for those reports, I'm a bit concerned that making a practice of reporting silent baddies in intermediate bots games could reduce my report weight. Does anybody know for sure whether this is a risk I'm taking, or has Riot said anything official on the subject?

Thanks in advance for your help.