Just because you didn't get your role due to Autofill, doesn't mean you have to troll

I was in champion select for a ranked game not an hour ago, and I got bottom, the role I wanted. I preffered Draven, and all of a sudden a teammate bans Draven. I type a "):" in chat, and then prefer Vayne. After the enemy bans, the next person to ban on our team bans Vayne; I once again type "???" followed by a "):". The next person bans and I prefer Jhin, then to "my surprise", the next teammate bans Jhin. At this point I was very angry, and directed to chat, because they banned all my mains. In the chat it turns out the person who banned Draven got autofilled as support, and then picked said they were gonna troll (this person picked Caitlyn). The person who banned Vayne was in a duo with the person who banned Draven. And the person who banned Jhin just banned Jhin. Thank gosh one of my teammates noticed this and dodged.

The main point here is how you shouln't just ban a teammate's champion or troll just because autofill got you a role you did not pick.