I checked the article to see if it was published on the April 1st.
Important words in the article:
"may possibly"
"theoretically it can happen"
Someone is just trying to justify their inflated salary by getting published. Considering that its a common food/drink that anyone can access, I doubt that it would ever happen.
If it did, I'd give up competing. It's stupid enough as it is now. Getting a drug ban for drinking a red bull would show up on your resume for life and would impact on your ability to be employed and possibly, down the track, have an impact on crossing borders.