If you never have done it, how can you have learned the hard way that it's not worth it?

Since we're nitpicking, OP said:

"Never have unprojected text."

Not:

"I never have [...]"

The absence of an explicit subject means that another correct interpretation of the sentence is that the OP is giving you some good advice.

Good advice about what? Unprotected text is worse than the alternatives, projected text, or not text at all?

That's an outrageous claim that needs some sort of justification.

A valid interpretation of the OP's sentence includes the advice never to have unprojected text.

Im not evaluating the worth of said advice, just the grammar, to play nitpick tennis with alex_duf who graciously conceded the point.

Everybody seems to be missing the fact that this was nothing more than a lewd pun. "Unprojected text" = "Unprotected sex". What would it even mean to "never have unprojected text"?

I see! I had failed to parse the sentence!