Well... I'd never say don't do it. However, what I would suggest is to make sure that your own technique -- and hence the technique which you are passing to your students -- is fully sound. To that end, I would also suggest that you might want to find a piano teacher -- a real live body, not some You[seless]Tube video -- to at least check your own technique.
In most cases, at elementary level, you are not likely to be really challenged by some child. However, it surely could happen -- and if and when it does, you also should be prepared to say to yourself "this kid is beyond me, or will be soon" and be able to send her or him to a technically and musically well qualified piano teacher.