One of the most effective ways we can denote sensitive content in our card is through labelling. You can use this feature to alert your user from sensitive content, Sensitive content can be anything that may cause offence to a reader or user, particularly in relation to religion, race, gender, politics, sexuality, disability, or vulgar language.
So making wCard a safer viewing platform we have introduced this feature, Hope you will like it and use it accordingly.
You can enable this by logging to your Account->Edit Card -> Settings-> Sensitive Material
Once you enable this, your card will be locked and a warning will appear on the same like this