Yes, because it's an ATC Forum, for ATC issues. Meandering comments about 'spotting', charities, and airshow accidents are not of any relevance to ATC unless you link them to aspects of our profession. You didn't.
If you want to debate the folly of air shows or otherwise, then pick a more appropriate forum. There's Private Flying or Aviation History for starters.
Censorship can be used to remove posts which break the rules, but it also has a use to remove chaff which is of no relevance to a particular area of PPRuNe, usually where the poster has evidently not read the specific Forum description.