For the person who doesn't know the differencg between bad manners and heckling

heckle
/'h?k(?)l/
verb
gerund or present participle: heckling
1.
interrupt (a public speaker) with derisive or aggressive comments or abuse.
"he was booed and heckled when he tried to address the demonstrators"
synonyms:
jeer, taunt, jibe at, shout down, shout at, boo, hiss, disrupt, interrupt, harass; shout catcalls at; barrack; informalgive someone a hard time
"he was booed and heckled when he tried to address the demonstrators"