Can CP problems be “fixed” this way?

Good day and Happy New Year,

(1) In one strata I am involved in I just saw large unattractive a handwritten sign affixed to the garage indicating the height of the door. I presume – as I was never informed – that this to stop vehicles too high from entering and damaging the door.

My question is: does a strata committee need to hold a general meeting or a strata meeting to what looks  to me like “adding to the common property”? I ask because there were no meetings of any type and because while the sign may be needed, I do not know as it has not been justified to the owners, it looks as if written by a 5 year old child and its unsightliness degrades the apartment building.

(2) Also I heard from another owner (but did not see) that in response to noise coming from a meter room’s fire board, the committee again with no paper trail, declined to engage a technician to fix the noise (which disturbed one resident in particular) and instead – and I kid you not – tied cushions to the meter room security gate in an effort to muffle the noise. Can they get away with (a) “adding to the CP without meetings”; (b) possibly affixing flammable items to the gate and (c) addressing the problem in such a cheap and nasty way that was never approved by the OC?

(3) Apart from I believe the committee is violating s.106, could the above be also seen as acting in bad faith?

Thanks in advance for replies.

For the record, in late 2018 I complained about the same noise (at least twice) and was told by the committee they will deal with it. So 4 years later they “dealt” with it with cushions.