The Appeal to Common Practice is a fallacy with the following structure:
1. X is a common action.
2. Therefore X is correct/moral/justified/reasonable, etc.
There.

If my argument relied solely on saying that because it was a common practice, it was right, then I would be guilty of this. I don't think I'm doing that though. I'm just saying it was successful elsewhere, and thus far it appears to be successful in
SL too.