Can I report toxic players that dodge/cause dodges?

Just had some brat stuck in support that decided that since our jg would let him have the role, he would just take it. Luckily someone dodged at the last second. I copied the log and I'd like to report him, is there any way I can do that? I'm sure we've all seen this happen and there needs to be a system in place to deal with these fools.