Game Feature to prevent spam bots

Sorry, I don't know which forum topic this would be under. But Riot needs to add some client feature that gives the user an option to block all invites from people below a certain level. I keep on getting friend requests from people who are trying to sell me RP scams and elo boosting and it is annoying. I know they're spam bots because their names have no logic behind them, and they're always level 1. I could always decline it, but they eventually resend another request within the next day. It also bugs me that I have the request sent every time I log on.