It used to be that "plain text" was pretty much impossible to make malicious. Security conscious people have the option of only interpreting plain text emails,

It used to be that "plain text" was pretty much impossible to make malicious. Security conscious people have the option of only interpreting plain text emails, for example. This seems to be another example of the human imperative to increase the complexity of everything until it become problematic and then unusable. I suppose in the future there will be people that refuse to interpret emojis...