Well that is unlucky if the booster uses static IP to boost, however I've used 2 VPN premium packages and they offered barely 2 IPs for every separate country, questionable if worth the money
@
you will not get banned, you will get your season's rewards removed as first strike anyway there's a very high chance nothing will happen.
Here's an
explaining very well the PR bullsh!t Riot pulls out about boosting.
People boost in China/Korea like crazy and Riot does nothing about it, streames in China even have contact numbers on their stream for boosting LOL