How to say "No cheating."

Question

1. No vale hacer trampa
2. No se vale hacer trampa.

Any of the above is acceptable? Also, any better options?

Gracias,

Answer 1

I would say that both are acceptable. To me, #1 is the best way of saying it, although I'd use trampas, in plural.

2 is heard as well. I believe that the inclusion of the pronoun is a regional thing although, in Spain, it's common that children get corrected if they add it.

Answer 2

No cheating.

It could be:

¡Sin hacer trampas!
¡No hacer trampas!

Answer 3

Perhaps "No haga trampa"?