Reasons why we should remove the /tag set filter:
1. The community is against it
It's clear that the community is against filters (see Add the ChatManager plugin and Enforce Better Chat Restrictions). However, /tag set has a filter and I believe we should apply our principles consistently.
2. The Scunthorpe problem
You cannot enter words containing "sra", "tca", "sta", and "sa" due to the filter. Because of this words like: "Stable" are blocked.
List of words containing "sra": https://www.bestwordlist.com/m/s/3/wordswithsra.htm
List of words containing "tca": https://www.bestwordlist.com/m/t/3/wordswithtca.htm
List of words containing "sta": https://www.bestwordlist.com/m/s/3/wordswithsta.htm
List of words containing "sa": https://www.bestwordlist.com/m/s/2/wordswithsa.htm
Thanks to tag filter, all of the words above are blocked, even if they don't communicate any position that a player might not have on the server.