Social media footer clicks reporting unusually high

[kleroy]

We recently noticed some unusual click activity in the Email Link Performance report and I'm trying to get to the bottom of it.  Like most company emails, we have our social media icons featured in the footer with links to each social channel.  When viewing the Link Performance Report, our Facebook icon is receiving a suspiciously high volume of clicks (usually over 60% of all email clicks). 

Bot activity is removed from this screenshot, and I also opened a case with Marketo support but after investigating, they said it was working as expected.  The main reason I'm second guessing this is because we're not seeing similar to Twitter or LinkedIn.  It seems to be a similar pattern on every email I check.   Has anyone else experienced something similar?

Thank you!