I really don't think a lot of people do that. What exactly do you mean, having a few instances of LoL running ARAM to refer for you? I honestly think you're better off using bots aha. 10-20 refs isn't a lot and I don't think you'd get caught out, most of the people I've heard of who get flagged for ref abuse have 100+ refs. I had 2 accounts in S3, one with 120 refs and the other with 50 and while the 120 got banned (permanently, RIP) the 50 was untouched.
Good luck anyways though, there is always a risk