I worried about it for a long time, shared articles with my wife, etc. We had to work out ways to find balance.
If my kids start to slack in other areas, disrespect their mom, or break other house rules to “game”, then there are repercussions in place and already discussed and agreed to with the kids. They had to help decide the penalties and agree to it beforehand. It has actually worked well. That, and with the push of a button on my phone, their internet goes bye-bye if needed.