Take a break at work and leave the daily routine, get together as a family and share what on other days you can't, relax and get away from stress; These are all good things we can do during Carnival days.
Unleashing any excess (sex, drugs, alcohol, violence) does not seem like a good idea because it would surely bring dire consequences to our lives.
In either case, what is revealed is a personal decision that has nothing to do with the fact that it is Carnival but rather with the exercise of our free will; Of course, nothing differs from any other everyday situation (apparently).
Being religious I could say that the very origin of the word Carnival goes back to the pagan celebration in which sacrifices were offered to the supposed god Baal (Holocausts) that is to say Meat to Baal; but beyond all this there is a spiritual background that translates into a collective expression of exaltation and lust.
This reflection cannot be taken as a desperate declaration of an anti-worldly Christian, rather an objective and realistic view based on the experience of life.
Everyone will make their own decision but at some point they will read this message again or remember it, so maybe they say it is true that there is a collective euphoria and maybe they stop to think for a while before throwing themselves wildly to commit some madness.