Forced arbitration with Smartwool socks
Appearance
Smartwool is a brand of socks.
Incident of EULA entrapment
Smartwool emailed a list of their account holders stating that they were opting them into forced arbitration, and to opt out, they must send a letter. through USPS Priority Mail, which is not the First Class mail that people typically use for mailing letters.

In addition to the typical loss of rights associated with arbitration, the customers were opted in via email and could simply reply to the email to opt out. According to the so-called "agreement," to opt out, a user must send a letter through USPS Priority Mail, which is not the type of mail that people typically use for a letter.[1]
References
Video associated with this article: https://www.youtube.com/watch?v=670rwHz1WV8