This is getting kind of silly.
If you don't file because your income is exempt and you don't have accessable income over the threshold, and you also keep good RECORDS, in the unlikely event that you're called in about that, you prove your situation, and the worse that can happen is a fine for not filing when you were supposed to. (But you're not supposed to.)
If people are going to push anything, push learning about the different kinds of income being accessible or not, and stop pushing unnecessary filing
About the irrational FEAR MONGERING that extensions are going to require tax returns, cross that bridge IF it ever happens.