Recently lost a relative who served in WW2, was at a service on Sunday (at which he usually joined us). Had tears streaming while the last post played.
The funeral was on Monday and again once the bugle started up I again couldn't stop the tears.
My job doesn't enforce a 2 min silence, but the noise level dropped considerably as many people chose to observe the silence.
Personally I dont mind if people choose not to participate in the 2 min silence, however if someone goes out of there way to make lots of noise etc while others around them are showing their respect it annoys the hell out of me, and this year I might have got the bombers out (pun intnended) on them!
It the same for anything though, I wouldn't think of **** about moisily while someone was showing their respects at a graveyard etc, and this should be no different.