@chilimatic That is NOT what Google says "the Gmail team explained that making it possible for Gmail users to "say goodbye to sifting through an entire message for that one pesky link" lowers the risk of a sender’s product getting marked as spam."
If a user marks your message as spam to quickly get it hidden from the inbox if they don't want anymore greatly affects your mail and can lead to all mail going to Spam.
You should do everything you can, just because you think it's not important does not mean that providers like Gmail don't.
Best practice: "commercial or professional procedures that are accepted or prescribed as being correct or most effective."
The key here is most effective, by following what others are doing and giving users who get mail by mistake or worse a way to NOT start automating your email going to trash is "effective".