My hypothesis is that the ignore button is largely used to give people justification for not responding to others, but users still often show posts of the people they ignore, just because they are curious what that person is saying.
I started ignoring some users recently, but than I realised - fuck it,
I can handle any shit anyone throw at me, bring it on!
I don't really think it's a question of you being or not being able to "handle it", but more a question of
why do you need to bother with sociopaths vomiting garbage around here?
The ignore button is not a psychological defense -- it is a time saver.
There is no such thing as worthless data. Everything and anything can trigger profound realisations.
Ignoring someone means you think they will never ever change, but that is impossible. Everything and anything can change, at any moment.
For example, yourself. You just earned your way
off my ignore list. Do me a favor, and don't earn your way back on, 'k?