Student or Learner
(Some time in the future) If he does something that you do not like , you can scold him.
(Some time in the future) If he does something that you will not like, you can scold him.
I use the first one. Is the second one a case of bad English? It sounds possible to me although it doesn't sound as good as the first. I mean he could do something in the future that "I" will not like (then) but it's okay for now.
The second does suggest that the "something" is something that you will not like in the future, but as it's difficult to know what you will or won't like in the future, I can't see that this is likely to be used.