Yesterday I had occasion to call a real estate broker regarding a property he was advertising on his website - which proudly stated that it "(the company) is proud of it's private clients and the strength of it's business"
I couldn't get him on the phone, so had to send an email, and at the bottom stated that I hated being such a pedant, but did he know about his rogue apostrophes?
Today, it's been changed. Although he's not talked to me directly yet.
I love pedants' corner - it's the only place that I could write something like this without feeling totally petty and unreasonable .