its true it is still a problem, and yes very dramatic if you just scroll certain accounts for these memo keys, you instantly hit that data. But there is not much one can do except making people aware through posts like yours.
Most of the times these are private keys for 'posting' only by the way, so not much harm can be done directly to the funds, but indeed to the reputation of the users. In any case it is bad and people will need to change.
Right here on Steemit the dialog box will warn you with a red warning when you put a private key formatted like string in the memo box. Bittrex could adopt that too when it detects similar behaviour...
@roelandp thank you for explaining that we already have a system here on Steemit to warn against sending private keys because I did not know that and now feel a bit foolish for not testing it before I made this post! I see now based on your suggestion that we would benefit warnings on the exchanges also and I will update the post to reflect that! I appreciate your upvote on my burrito post earlier today!
i'm huge fan of burritos :)
upvoted please do same
People should be discouraged from ever having their keys in clipboard at all. Password managers like LastPass can help prevent you from having private keys in clipboard, which exposes you to various risks (malicious and accidental).