Guest sensitivity or Discourtesy?

Several guests these past weeks told me that a couple of guest they roomed with are discourteous and harsh in actions:

1. One was told "Shhh" because she was on the phone inside the room and talking loud.
2. One wanted to change rooms because the guests with them showed them displeasure by acting upset because of the noise coming from a lot of plastic crumpling while they look for their stuff inside their belongings.
3. Another one complained because she got a cold shoulder and even said the mother-daughter tandem look like antagonists in hero movies

While I find them disconcerting, I finally got to talk to the two guests who have been staying with me for six months or more and found out that the complaints were misplaced and that the only motive they both have on the seven guests who roomed with them in a span of three weeks (all Filipinas) is that they're not considerate.

I may add that the guests who checked in in my hostel are all first-timers and I guess they all do not know how to act in a room that is shared by other guests in the room. This despite a paper reminder complete with drawings not to create noise inside the quarters.

Has this happened to you? Should I keep reminding all my guests to all the house rules I have that is long and laborious to read? How do you solve this kind of situation wherein on one hand there are sensitive guests who are being corrected and there are those who keep the rules of the hostel and are branded as villains? How do you keep the peace inside the room?

Your responses would be much appreciated.

Thanks.