Some poor sod at Westpac (with whom I've banked since 1992) demonstrates why it's a bad idea to post to both your personal and corporate Twitter accounts from the same client:
The tweet was deleted about 40 minutes after it was posted, which was even more silly than posting it in the first place. If you screw up in public, you recover in public. Don't just try to pretend it didn’t happen.
I've always used this story to illustrate why we shouldn't assume that ‘real people’ understand or care about website URLs. Unfortunately the story is ten years old and it's easy for people who disagree with me to try to explain how much has changed in the last decade, and how web users are so much more sophisticated now.