Well the post states you should block “fools” and a lot of people will consider people who disagree with them to be fools, which will create the echo chamber

May I ask what we should do with criminals then?

Correct, but if you can do shopping at any time, you should aspire to do it when there are as few people as possible. That goes for everyone and it also works for most non group activities, such as driving

Isn’t that cause it’s the year they put it in everything?