Today I want you just to imagine if it could exist some day.
Image Source
(thanks to 
PROS
+ auto-type-bots will be revealed and may be dismissed with flags and some new restrictions of users. I really think that users might need more rights to restrict spam;
+ people can chat on the site so their content and comments would be less like ‘thank you’ or ‘nice post’.
+ (main) people leave other social media platforms or messengers!
CONS
- spam in private messages might appear;
- less content will be published because people would tell a lot in private messages.
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I really don‘t know if it could be a good idea so I want to look for aome opinions.
Type in the comments what you think of possible private messages on Steemit and if it makes sense at all.