Thats depends on the situation. What will be the response at Anfield if the PA system, as a horst to a England match, welcomes england's supporting party from Manchester 
the solitary fan also did not conform to your ideals. But your liverpool fans gang up to do something about it. From what i hear he is not badmouthing liverpool. he was just showing his guts to kiss his shirt badge in a Liverpool crowd.

i cant imagine what happen to him if he badmouth Liverpool team.

What if the Singaporean and Indonesian fans badmouth MALAYSIA?

the Singaporean public is hardly allowed to vocally support their team in the stadium. What will they think of us if they are allowed to curse our team at ours?

The least i expect from you is that eventhough you receive the OOTs as guest, please remind them of their position as guest and you are not having it if they do any gesture to undermine our national team..

the worst i expect is for you to join them booing our national team also.