Bandalism 

Bandalism ban-dəl-i-zəm n .: the willful or malicious destruction of, or damage to, the fabric of a rock/pop/indie group brought about by one or more of its members

When Dave kicked in the amps, threw his bass at the manager, set the drummer on fire, and ran away crying, although funny, was an extreme act of bandalism.

Bandalism by Johnny Wells March 31, 2009

Bandalism 

Punk movement influenced by an array of legendary rock bands

Bandalism is in your blood if you are into legendary rock bands

Bandalism by Bandalist June 10, 2015

bandalism 

bandalism, n., destruction of a hotel room or arena by a rock band and/or its audience.

The fans at the concert engaged in serious bandalism by tearing out the seats at the stadium.

bandalism by Momus the Sarcastic August 14, 2009

cultural vandalism

The act of partisan ideologues taking over entertainment properties and turning them into (typically poorly received) political agitprop.

Marvel and DC have been huge victims of cultural vandalism these past few years,

cultural vandalism by answerer5976 August 16, 2021

Xandalism 

The act of committing vandalism while blacked out on xanax and booze. Xanax, a prescription medication used to treat anxiety, can cause memory blackouts of hours or even days when consumed with alcohol. Regrettable behavior such as xandalism inevitably ensues.

Person 1: Did you hear about Brice? He took a fist full of xanax and drank a pint of Jack Daniel's, then he got arrested for smashing a church window. He doesn't remember a thing!

Person 2: Damn, sounds like he some did xandalism then

Xandalism by 4highs October 23, 2019

Wikipedia Vandalism 

Wikipedia vandalism is an act of course where the user will add an irrelevant comment, remove all the text, replacing the text, adding links etc, which have nothing to do with the original article.

Person 1: Why the fuck are there Mario links on the fucking Sonic page on Wikipedia?

Person 2: Some faggot did Wikipedia Vandalism again.

Wikipedia Vandalism by WE HATE YOU TOTTENHAM October 18, 2016

Mandalism 

(sounds like it spelled). The religion consisting of Ian the messiah and the flying spaghetti monster, who has created everything in our world. Notable beliefs include: Thou shall not murder ,rape, steal, or play lacross. Also if thou wear crocks, thou shall be sent to the core of earth for an eternity.

Ian: I am the messiah of mandalism, we will except any followers, find our petition online.
Martin: Thank you messiah, your teachings have revolutionized my life.

Mandalism by wowlookoverthere September 20, 2016