I assume you mean publicly visible screens? I don't see a problem. Passers-by would know instantly if a fellow was viewing a porn video, but taxes and banking

I assume you mean publicly visible screens? I don't see a problem. Passers-by would know instantly if a fellow was viewing a porn video, but taxes and banking consist of a bunch of small, irrelevant numbers. If passers-by are polite, then none of them will be lingering long enough to get in one another's business. Just shoo them away.