[tata71]

No.

Just call them, don't invade their privacy, unless they're just meat to you. In which case, change industries.

[anonfounder747]

Thank you @magn1fico, for sharing the idea.

@tata71, I believe it can be done in a privacy preserving way. Think simple counting to answer questions like 'how many users clicked on this button?' without logging PII.